./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe026_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe026_tso.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-cde23df-m [2024-06-14 14:05:41,121 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:05:41,195 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:05:41,200 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:05:41,200 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:05:41,235 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:05:41,242 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:05:41,243 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:05:41,243 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:05:41,245 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:05:41,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:05:41,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:05:41,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:05:41,248 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:05:41,248 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:05:41,248 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:05:41,249 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:05:41,252 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:05:41,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:05:41,254 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:05:41,255 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:05:41,255 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:05:41,255 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:05:41,256 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:05:41,256 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:05:41,256 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:05:41,256 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:05:41,257 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:05:41,257 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:05:41,257 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:05:41,258 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:05:41,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:05:41,259 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:05:41,259 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:05:41,259 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:05:41,259 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:05:41,260 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:05:41,260 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:05:41,260 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:05:41,260 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:05:41,261 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:05:41,261 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:05:41,261 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:05:41,261 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:05:41,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:05:41,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:05:41,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:05:41,487 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:05:41,487 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:05:41,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2024-06-14 14:05:42,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:05:42,976 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:05:42,977 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe026_tso.i [2024-06-14 14:05:42,993 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cc9d175d/20b2554545384f478935b1de37522ca1/FLAG96f99f4bb [2024-06-14 14:05:43,007 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cc9d175d/20b2554545384f478935b1de37522ca1 [2024-06-14 14:05:43,009 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:05:43,010 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:05:43,010 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe026_tso.yml/witness.yml [2024-06-14 14:05:43,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:05:43,162 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:05:43,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:05:43,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:05:43,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:05:43,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:05:43" (1/2) ... [2024-06-14 14:05:43,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81d9d1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:43, skipping insertion in model container [2024-06-14 14:05:43,169 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:05:43" (1/2) ... [2024-06-14 14:05:43,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@73ba017d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:05:43, skipping insertion in model container [2024-06-14 14:05:43,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:43" (2/2) ... [2024-06-14 14:05:43,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@81d9d1b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43, skipping insertion in model container [2024-06-14 14:05:43,173 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:43" (2/2) ... [2024-06-14 14:05:43,173 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:05:43,229 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:05:43,231 INFO L97 edCorrectnessWitness]: Location invariant before [L776-L776] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 1) && y <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 14:05:43,231 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 1) && y <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 14:05:43,231 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EBX) + (long long )y >= 0LL && (1LL - (long long )__unbuffered_p2_EBX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EBX) + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )__unbuffered_p2_EBX >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (1LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 1) && y <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-14 14:05:43,232 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:05:43,232 INFO L106 edCorrectnessWitness]: ghost_update [L774-L774] multithreaded = 1; [2024-06-14 14:05:43,270 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:05:43,623 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:05:43,632 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:05:43,810 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:05:43,869 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:05:43,872 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43 WrapperNode [2024-06-14 14:05:43,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:05:43,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:05:43,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:05:43,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:05:43,880 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 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:43,915 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 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:43,951 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 14:05:43,951 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:05:43,952 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:05:43,952 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:05:43,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:05:43,963 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:43,963 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:43,968 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:43,993 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]. [2024-06-14 14:05:43,994 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:43,994 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:44,001 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:44,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:44,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:44,007 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:44,010 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:05:44,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:05:44,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:05:44,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:05:44,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (1/1) ... [2024-06-14 14:05:44,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:05:44,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:05:44,043 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) [2024-06-14 14:05:44,050 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 [2024-06-14 14:05:44,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:05:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:05:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:05:44,084 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:05:44,084 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:05:44,085 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:05:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:05:44,085 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:05:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:05:44,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:05:44,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:05:44,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:05:44,088 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:05:44,209 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:05:44,211 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:05:44,580 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:05:44,581 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:05:44,664 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:05:44,664 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:05:44,665 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:05:44 BoogieIcfgContainer [2024-06-14 14:05:44,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:05:44,667 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:05:44,667 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:05:44,669 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:05:44,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:05:43" (1/4) ... [2024-06-14 14:05:44,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234a5017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:05:44, skipping insertion in model container [2024-06-14 14:05:44,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:05:43" (2/4) ... [2024-06-14 14:05:44,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234a5017 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:05:44, skipping insertion in model container [2024-06-14 14:05:44,671 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:05:43" (3/4) ... [2024-06-14 14:05:44,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234a5017 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:05:44, skipping insertion in model container [2024-06-14 14:05:44,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:05:44" (4/4) ... [2024-06-14 14:05:44,673 INFO L112 eAbstractionObserver]: Analyzing ICFG safe026_tso.i [2024-06-14 14:05:44,688 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:05:44,689 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:05:44,689 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:05:44,743 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:05:44,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 14:05:44,813 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-14 14:05:44,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:05:44,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 59 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:05:44,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-14 14:05:44,819 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-14 14:05:44,833 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:05:44,839 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;@70e63d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:05:44,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:05:44,843 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:05:44,844 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:05:44,844 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:05:44,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:44,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:05:44,846 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)] === [2024-06-14 14:05:44,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:44,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1910605513, now seen corresponding path program 1 times [2024-06-14 14:05:44,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:44,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129557116] [2024-06-14 14:05:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:45,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129557116] [2024-06-14 14:05:45,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129557116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:45,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:45,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:05:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248608875] [2024-06-14 14:05:45,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:45,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:05:45,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:05:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:05:45,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-14 14:05:45,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:45,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:45,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-14 14:05:45,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,870 INFO L124 PetriNetUnfolderBase]: 474/796 cut-off events. [2024-06-14 14:05:45,870 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-14 14:05:45,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1607 conditions, 796 events. 474/796 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3875 event pairs, 295 based on Foata normal form. 1/756 useless extension candidates. Maximal degree in co-relation 1592. Up to 744 conditions per place. [2024-06-14 14:05:45,885 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-14 14:05:45,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-14 14:05:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:05:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:05:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-14 14:05:45,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-14 14:05:45,898 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-14 14:05:45,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-14 14:05:45,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:45,904 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-14 14:05:45,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-14 14:05:45,911 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-14 14:05:45,911 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-14 14:05:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:45,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:45,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:05:45,913 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)] === [2024-06-14 14:05:45,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2140853290, now seen corresponding path program 1 times [2024-06-14 14:05:45,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:45,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457606940] [2024-06-14 14:05:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:45,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:46,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:46,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457606940] [2024-06-14 14:05:46,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457606940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:46,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:46,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:05:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585753373] [2024-06-14 14:05:46,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:46,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:05:46,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:05:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:05:46,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:05:46,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:46,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:05:46,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:46,448 INFO L124 PetriNetUnfolderBase]: 598/1011 cut-off events. [2024-06-14 14:05:46,449 INFO L125 PetriNetUnfolderBase]: For 211/249 co-relation queries the response was YES. [2024-06-14 14:05:46,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2317 conditions, 1011 events. 598/1011 cut-off events. For 211/249 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4874 event pairs, 320 based on Foata normal form. 3/994 useless extension candidates. Maximal degree in co-relation 2302. Up to 909 conditions per place. [2024-06-14 14:05:46,456 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-14 14:05:46,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 248 flow [2024-06-14 14:05:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 14:05:46,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-14 14:05:46,461 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 103 transitions. [2024-06-14 14:05:46,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 248 flow [2024-06-14 14:05:46,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:46,466 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-14 14:05:46,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-14 14:05:46,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-14 14:05:46,467 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-14 14:05:46,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:46,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:46,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:05:46,472 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)] === [2024-06-14 14:05:46,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:46,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1941942198, now seen corresponding path program 1 times [2024-06-14 14:05:46,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086108990] [2024-06-14 14:05:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:46,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:46,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086108990] [2024-06-14 14:05:46,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086108990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:46,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:46,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681823047] [2024-06-14 14:05:46,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:46,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:46,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:46,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:46,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:46,957 INFO L124 PetriNetUnfolderBase]: 733/1220 cut-off events. [2024-06-14 14:05:46,958 INFO L125 PetriNetUnfolderBase]: For 656/656 co-relation queries the response was YES. [2024-06-14 14:05:46,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3129 conditions, 1220 events. 733/1220 cut-off events. For 656/656 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5886 event pairs, 234 based on Foata normal form. 5/1224 useless extension candidates. Maximal degree in co-relation 3111. Up to 1040 conditions per place. [2024-06-14 14:05:46,968 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-14 14:05:46,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 80 transitions, 433 flow [2024-06-14 14:05:46,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 14:05:46,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-14 14:05:46,970 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 131 transitions. [2024-06-14 14:05:46,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 80 transitions, 433 flow [2024-06-14 14:05:46,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 80 transitions, 429 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:46,973 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 260 flow [2024-06-14 14:05:46,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2024-06-14 14:05:46,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-14 14:05:46,974 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 260 flow [2024-06-14 14:05:46,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:46,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:46,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:46,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:05:46,975 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)] === [2024-06-14 14:05:46,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:46,975 INFO L85 PathProgramCache]: Analyzing trace with hash -477046989, now seen corresponding path program 1 times [2024-06-14 14:05:46,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:46,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875544796] [2024-06-14 14:05:46,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:46,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:47,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:47,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875544796] [2024-06-14 14:05:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875544796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:47,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:47,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236153934] [2024-06-14 14:05:47,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:47,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:47,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:47,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:47,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-14 14:05:47,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:47,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:47,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:47,600 INFO L124 PetriNetUnfolderBase]: 794/1331 cut-off events. [2024-06-14 14:05:47,601 INFO L125 PetriNetUnfolderBase]: For 1626/1626 co-relation queries the response was YES. [2024-06-14 14:05:47,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4066 conditions, 1331 events. 794/1331 cut-off events. For 1626/1626 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6629 event pairs, 146 based on Foata normal form. 22/1352 useless extension candidates. Maximal degree in co-relation 4043. Up to 1005 conditions per place. [2024-06-14 14:05:47,612 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 67 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-14 14:05:47,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 550 flow [2024-06-14 14:05:47,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 14:05:47,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-14 14:05:47,616 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 260 flow. Second operand 6 states and 153 transitions. [2024-06-14 14:05:47,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 550 flow [2024-06-14 14:05:47,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 546 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:47,625 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 304 flow [2024-06-14 14:05:47,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-14 14:05:47,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-14 14:05:47,626 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 304 flow [2024-06-14 14:05:47,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-14 14:05:47,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:47,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:47,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:05:47,627 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)] === [2024-06-14 14:05:47,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:47,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2062897817, now seen corresponding path program 1 times [2024-06-14 14:05:47,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:47,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772837479] [2024-06-14 14:05:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:47,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:47,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:47,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772837479] [2024-06-14 14:05:47,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772837479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:47,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:47,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:05:47,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625804937] [2024-06-14 14:05:47,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:47,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:05:47,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:05:47,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:05:47,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:05:47,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:47,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:47,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:05:47,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:48,099 INFO L124 PetriNetUnfolderBase]: 692/1223 cut-off events. [2024-06-14 14:05:48,099 INFO L125 PetriNetUnfolderBase]: For 1998/2034 co-relation queries the response was YES. [2024-06-14 14:05:48,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1223 events. 692/1223 cut-off events. For 1998/2034 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6342 event pairs, 216 based on Foata normal form. 2/1207 useless extension candidates. Maximal degree in co-relation 3978. Up to 1076 conditions per place. [2024-06-14 14:05:48,109 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 51 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-06-14 14:05:48,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 67 transitions, 462 flow [2024-06-14 14:05:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:48,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-14 14:05:48,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 14:05:48,111 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 304 flow. Second operand 4 states and 98 transitions. [2024-06-14 14:05:48,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 67 transitions, 462 flow [2024-06-14 14:05:48,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 67 transitions, 426 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:48,115 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 310 flow [2024-06-14 14:05:48,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-14 14:05:48,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-14 14:05:48,116 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 310 flow [2024-06-14 14:05:48,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:48,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:48,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:48,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:05:48,117 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)] === [2024-06-14 14:05:48,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1847249324, now seen corresponding path program 1 times [2024-06-14 14:05:48,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:48,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863669335] [2024-06-14 14:05:48,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:48,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:48,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:48,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863669335] [2024-06-14 14:05:48,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863669335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:48,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:48,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:48,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786153879] [2024-06-14 14:05:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:48,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:48,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:48,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:48,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 310 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) [2024-06-14 14:05:48,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:48,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:48,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:48,682 INFO L124 PetriNetUnfolderBase]: 795/1324 cut-off events. [2024-06-14 14:05:48,682 INFO L125 PetriNetUnfolderBase]: For 2606/2606 co-relation queries the response was YES. [2024-06-14 14:05:48,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4432 conditions, 1324 events. 795/1324 cut-off events. For 2606/2606 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6568 event pairs, 254 based on Foata normal form. 4/1327 useless extension candidates. Maximal degree in co-relation 4404. Up to 1150 conditions per place. [2024-06-14 14:05:48,693 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 57 selfloop transitions, 17 changer transitions 0/80 dead transitions. [2024-06-14 14:05:48,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 80 transitions, 551 flow [2024-06-14 14:05:48,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:48,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 14:05:48,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 14:05:48,695 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 310 flow. Second operand 5 states and 124 transitions. [2024-06-14 14:05:48,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 80 transitions, 551 flow [2024-06-14 14:05:48,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 537 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:48,702 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 377 flow [2024-06-14 14:05:48,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 14:05:48,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-14 14:05:48,705 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 377 flow [2024-06-14 14:05:48,705 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) [2024-06-14 14:05:48,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:48,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:48,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:05:48,706 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)] === [2024-06-14 14:05:48,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:48,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1830061064, now seen corresponding path program 2 times [2024-06-14 14:05:48,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:48,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660152725] [2024-06-14 14:05:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:48,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:49,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:49,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660152725] [2024-06-14 14:05:49,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660152725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:49,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:49,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720013243] [2024-06-14 14:05:49,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:49,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:49,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:49,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:49,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 377 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) [2024-06-14 14:05:49,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:49,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:49,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:49,275 INFO L124 PetriNetUnfolderBase]: 775/1281 cut-off events. [2024-06-14 14:05:49,275 INFO L125 PetriNetUnfolderBase]: For 3348/3348 co-relation queries the response was YES. [2024-06-14 14:05:49,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 1281 events. 775/1281 cut-off events. For 3348/3348 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6214 event pairs, 264 based on Foata normal form. 2/1282 useless extension candidates. Maximal degree in co-relation 4494. Up to 1114 conditions per place. [2024-06-14 14:05:49,286 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 19 changer transitions 0/76 dead transitions. [2024-06-14 14:05:49,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 76 transitions, 563 flow [2024-06-14 14:05:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 14:05:49,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:05:49,288 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 377 flow. Second operand 5 states and 120 transitions. [2024-06-14 14:05:49,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 76 transitions, 563 flow [2024-06-14 14:05:49,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 542 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:49,294 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 410 flow [2024-06-14 14:05:49,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=410, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-06-14 14:05:49,295 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-14 14:05:49,295 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 410 flow [2024-06-14 14:05:49,295 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) [2024-06-14 14:05:49,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:49,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:49,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:05:49,296 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:49,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:49,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1949231958, now seen corresponding path program 1 times [2024-06-14 14:05:49,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:49,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252184920] [2024-06-14 14:05:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:49,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:49,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:49,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252184920] [2024-06-14 14:05:49,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252184920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:49,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:49,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654198678] [2024-06-14 14:05:49,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:49,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:49,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:49,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:49,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:05:49,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2024-06-14 14:05:49,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:49,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:05:49,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:49,840 INFO L124 PetriNetUnfolderBase]: 657/1173 cut-off events. [2024-06-14 14:05:49,840 INFO L125 PetriNetUnfolderBase]: For 3344/3360 co-relation queries the response was YES. [2024-06-14 14:05:49,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 1173 events. 657/1173 cut-off events. For 3344/3360 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 6006 event pairs, 184 based on Foata normal form. 4/1169 useless extension candidates. Maximal degree in co-relation 4099. Up to 992 conditions per place. [2024-06-14 14:05:49,851 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 61 selfloop transitions, 9 changer transitions 0/79 dead transitions. [2024-06-14 14:05:49,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 79 transitions, 602 flow [2024-06-14 14:05:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 14:05:49,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-14 14:05:49,853 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 410 flow. Second operand 5 states and 119 transitions. [2024-06-14 14:05:49,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 79 transitions, 602 flow [2024-06-14 14:05:49,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 79 transitions, 575 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:49,860 INFO L231 Difference]: Finished difference. Result has 68 places, 63 transitions, 424 flow [2024-06-14 14:05:49,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=424, PETRI_PLACES=68, PETRI_TRANSITIONS=63} [2024-06-14 14:05:49,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-06-14 14:05:49,861 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 63 transitions, 424 flow [2024-06-14 14:05:49,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 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) [2024-06-14 14:05:49,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:49,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:49,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:05:49,862 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)] === [2024-06-14 14:05:49,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash -597530251, now seen corresponding path program 1 times [2024-06-14 14:05:49,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:49,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715666891] [2024-06-14 14:05:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:49,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:50,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715666891] [2024-06-14 14:05:50,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715666891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548221699] [2024-06-14 14:05:50,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:50,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:50,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:50,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 424 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:50,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:50,455 INFO L124 PetriNetUnfolderBase]: 842/1406 cut-off events. [2024-06-14 14:05:50,455 INFO L125 PetriNetUnfolderBase]: For 5549/5549 co-relation queries the response was YES. [2024-06-14 14:05:50,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5123 conditions, 1406 events. 842/1406 cut-off events. For 5549/5549 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7041 event pairs, 248 based on Foata normal form. 20/1425 useless extension candidates. Maximal degree in co-relation 5090. Up to 1117 conditions per place. [2024-06-14 14:05:50,470 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 65 selfloop transitions, 20 changer transitions 0/91 dead transitions. [2024-06-14 14:05:50,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 91 transitions, 676 flow [2024-06-14 14:05:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:05:50,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 14:05:50,472 INFO L175 Difference]: Start difference. First operand has 68 places, 63 transitions, 424 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:05:50,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 91 transitions, 676 flow [2024-06-14 14:05:50,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 653 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:50,481 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 467 flow [2024-06-14 14:05:50,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-06-14 14:05:50,481 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-14 14:05:50,482 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 467 flow [2024-06-14 14:05:50,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:50,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:50,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:05:50,483 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)] === [2024-06-14 14:05:50,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1714555393, now seen corresponding path program 2 times [2024-06-14 14:05:50,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:50,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578944808] [2024-06-14 14:05:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578944808] [2024-06-14 14:05:50,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578944808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:50,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301253458] [2024-06-14 14:05:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:50,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:50,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:50,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 467 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:50,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,057 INFO L124 PetriNetUnfolderBase]: 859/1437 cut-off events. [2024-06-14 14:05:51,057 INFO L125 PetriNetUnfolderBase]: For 6349/6349 co-relation queries the response was YES. [2024-06-14 14:05:51,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5501 conditions, 1437 events. 859/1437 cut-off events. For 6349/6349 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7215 event pairs, 276 based on Foata normal form. 4/1440 useless extension candidates. Maximal degree in co-relation 5467. Up to 1236 conditions per place. [2024-06-14 14:05:51,072 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 60 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-14 14:05:51,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 87 transitions, 697 flow [2024-06-14 14:05:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:51,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 14:05:51,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:05:51,074 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 467 flow. Second operand 6 states and 140 transitions. [2024-06-14 14:05:51,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 87 transitions, 697 flow [2024-06-14 14:05:51,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 653 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:51,085 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 494 flow [2024-06-14 14:05:51,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=494, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-06-14 14:05:51,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-14 14:05:51,086 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 494 flow [2024-06-14 14:05:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:51,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:05:51,087 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)] === [2024-06-14 14:05:51,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1178151279, now seen corresponding path program 3 times [2024-06-14 14:05:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159206173] [2024-06-14 14:05:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:51,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159206173] [2024-06-14 14:05:51,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159206173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:51,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:51,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:51,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453467457] [2024-06-14 14:05:51,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:51,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:51,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:51,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:51,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:51,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:51,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 494 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:51,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:51,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,706 INFO L124 PetriNetUnfolderBase]: 851/1425 cut-off events. [2024-06-14 14:05:51,707 INFO L125 PetriNetUnfolderBase]: For 7192/7192 co-relation queries the response was YES. [2024-06-14 14:05:51,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5553 conditions, 1425 events. 851/1425 cut-off events. For 7192/7192 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7119 event pairs, 226 based on Foata normal form. 4/1428 useless extension candidates. Maximal degree in co-relation 5518. Up to 1073 conditions per place. [2024-06-14 14:05:51,720 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 61 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-14 14:05:51,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 93 transitions, 752 flow [2024-06-14 14:05:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 14:05:51,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:05:51,722 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 494 flow. Second operand 6 states and 144 transitions. [2024-06-14 14:05:51,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 93 transitions, 752 flow [2024-06-14 14:05:51,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 93 transitions, 699 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:51,734 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 526 flow [2024-06-14 14:05:51,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=526, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2024-06-14 14:05:51,734 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-14 14:05:51,735 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 526 flow [2024-06-14 14:05:51,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:51,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:05:51,736 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)] === [2024-06-14 14:05:51,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,736 INFO L85 PathProgramCache]: Analyzing trace with hash 239444957, now seen corresponding path program 1 times [2024-06-14 14:05:51,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524886597] [2024-06-14 14:05:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:52,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524886597] [2024-06-14 14:05:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524886597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:52,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:52,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:52,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703222210] [2024-06-14 14:05:52,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:52,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:52,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:52,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:52,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 526 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) [2024-06-14 14:05:52,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:52,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:52,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:52,360 INFO L124 PetriNetUnfolderBase]: 928/1560 cut-off events. [2024-06-14 14:05:52,361 INFO L125 PetriNetUnfolderBase]: For 9773/9773 co-relation queries the response was YES. [2024-06-14 14:05:52,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6274 conditions, 1560 events. 928/1560 cut-off events. For 9773/9773 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8093 event pairs, 216 based on Foata normal form. 12/1571 useless extension candidates. Maximal degree in co-relation 6238. Up to 953 conditions per place. [2024-06-14 14:05:52,374 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 75 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-14 14:05:52,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 870 flow [2024-06-14 14:05:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:05:52,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-14 14:05:52,376 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 526 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:05:52,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 870 flow [2024-06-14 14:05:52,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 102 transitions, 803 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:52,389 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 537 flow [2024-06-14 14:05:52,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=537, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-06-14 14:05:52,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 36 predicate places. [2024-06-14 14:05:52,390 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 537 flow [2024-06-14 14:05:52,390 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) [2024-06-14 14:05:52,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:52,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:52,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:05:52,391 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)] === [2024-06-14 14:05:52,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1343567675, now seen corresponding path program 1 times [2024-06-14 14:05:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:52,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181502706] [2024-06-14 14:05:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:52,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:52,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:52,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181502706] [2024-06-14 14:05:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181502706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:52,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375366941] [2024-06-14 14:05:52,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:52,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:52,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:52,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:52,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 537 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) [2024-06-14 14:05:52,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:52,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:52,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:52,985 INFO L124 PetriNetUnfolderBase]: 908/1533 cut-off events. [2024-06-14 14:05:52,985 INFO L125 PetriNetUnfolderBase]: For 10328/10328 co-relation queries the response was YES. [2024-06-14 14:05:52,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6107 conditions, 1533 events. 908/1533 cut-off events. For 10328/10328 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7943 event pairs, 182 based on Foata normal form. 12/1544 useless extension candidates. Maximal degree in co-relation 6070. Up to 947 conditions per place. [2024-06-14 14:05:52,998 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 72 selfloop transitions, 22 changer transitions 0/100 dead transitions. [2024-06-14 14:05:52,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 801 flow [2024-06-14 14:05:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:05:53,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-14 14:05:53,000 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 537 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:05:53,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 801 flow [2024-06-14 14:05:53,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 100 transitions, 770 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:53,016 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 557 flow [2024-06-14 14:05:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=557, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-06-14 14:05:53,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-14 14:05:53,017 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 557 flow [2024-06-14 14:05:53,017 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) [2024-06-14 14:05:53,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:53,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:53,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:05:53,018 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)] === [2024-06-14 14:05:53,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:53,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1200595595, now seen corresponding path program 2 times [2024-06-14 14:05:53,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:53,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848443900] [2024-06-14 14:05:53,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:53,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:53,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848443900] [2024-06-14 14:05:53,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848443900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:53,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:53,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:53,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192247038] [2024-06-14 14:05:53,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:53,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:53,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:53,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:53,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:53,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:53,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 557 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) [2024-06-14 14:05:53,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:53,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:53,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:53,573 INFO L124 PetriNetUnfolderBase]: 888/1495 cut-off events. [2024-06-14 14:05:53,574 INFO L125 PetriNetUnfolderBase]: For 10733/10733 co-relation queries the response was YES. [2024-06-14 14:05:53,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6001 conditions, 1495 events. 888/1495 cut-off events. For 10733/10733 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7711 event pairs, 141 based on Foata normal form. 12/1503 useless extension candidates. Maximal degree in co-relation 5962. Up to 805 conditions per place. [2024-06-14 14:05:53,586 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 65 selfloop transitions, 23 changer transitions 0/94 dead transitions. [2024-06-14 14:05:53,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 94 transitions, 767 flow [2024-06-14 14:05:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:53,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:53,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 14:05:53,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-14 14:05:53,588 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 557 flow. Second operand 6 states and 139 transitions. [2024-06-14 14:05:53,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 94 transitions, 767 flow [2024-06-14 14:05:53,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 94 transitions, 710 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:53,602 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 522 flow [2024-06-14 14:05:53,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=522, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2024-06-14 14:05:53,602 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-14 14:05:53,603 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 522 flow [2024-06-14 14:05:53,603 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) [2024-06-14 14:05:53,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:53,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:53,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:05:53,604 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:53,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash 383850756, now seen corresponding path program 1 times [2024-06-14 14:05:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:53,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492876282] [2024-06-14 14:05:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:53,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:53,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:53,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492876282] [2024-06-14 14:05:53,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492876282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:53,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:53,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:53,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385644107] [2024-06-14 14:05:53,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:53,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:53,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:53,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:53,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:54,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:05:54,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 522 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:54,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:05:54,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:54,224 INFO L124 PetriNetUnfolderBase]: 796/1420 cut-off events. [2024-06-14 14:05:54,224 INFO L125 PetriNetUnfolderBase]: For 8156/8192 co-relation queries the response was YES. [2024-06-14 14:05:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5491 conditions, 1420 events. 796/1420 cut-off events. For 8156/8192 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7661 event pairs, 217 based on Foata normal form. 1/1400 useless extension candidates. Maximal degree in co-relation 5451. Up to 1239 conditions per place. [2024-06-14 14:05:54,236 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 63 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-14 14:05:54,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 89 transitions, 774 flow [2024-06-14 14:05:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:05:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:05:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 14:05:54,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-14 14:05:54,238 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 522 flow. Second operand 5 states and 117 transitions. [2024-06-14 14:05:54,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 89 transitions, 774 flow [2024-06-14 14:05:54,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 89 transitions, 705 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:54,253 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 531 flow [2024-06-14 14:05:54,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=531, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2024-06-14 14:05:54,254 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-14 14:05:54,255 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 531 flow [2024-06-14 14:05:54,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:54,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:54,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:05:54,256 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:54,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1978509658, now seen corresponding path program 2 times [2024-06-14 14:05:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402718125] [2024-06-14 14:05:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:54,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:54,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402718125] [2024-06-14 14:05:54,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402718125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:54,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:54,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:05:54,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612014155] [2024-06-14 14:05:54,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:54,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:05:54,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:54,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:05:54,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:05:54,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:05:54,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:54,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:05:54,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:54,837 INFO L124 PetriNetUnfolderBase]: 798/1421 cut-off events. [2024-06-14 14:05:54,838 INFO L125 PetriNetUnfolderBase]: For 8828/8862 co-relation queries the response was YES. [2024-06-14 14:05:54,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5454 conditions, 1421 events. 798/1421 cut-off events. For 8828/8862 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7642 event pairs, 217 based on Foata normal form. 2/1403 useless extension candidates. Maximal degree in co-relation 5414. Up to 1243 conditions per place. [2024-06-14 14:05:54,850 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 64 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-14 14:05:54,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 715 flow [2024-06-14 14:05:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-14 14:05:54,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 14:05:54,852 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 531 flow. Second operand 4 states and 98 transitions. [2024-06-14 14:05:54,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 715 flow [2024-06-14 14:05:54,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 87 transitions, 689 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-14 14:05:54,866 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 544 flow [2024-06-14 14:05:54,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=544, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2024-06-14 14:05:54,867 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-14 14:05:54,867 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 544 flow [2024-06-14 14:05:54,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:54,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:54,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:54,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:05:54,868 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)] === [2024-06-14 14:05:54,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:54,868 INFO L85 PathProgramCache]: Analyzing trace with hash -434268062, now seen corresponding path program 1 times [2024-06-14 14:05:54,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:54,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411927309] [2024-06-14 14:05:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:54,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411927309] [2024-06-14 14:05:55,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411927309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:55,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890014995] [2024-06-14 14:05:55,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:55,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:55,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:55,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 544 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:55,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:55,437 INFO L124 PetriNetUnfolderBase]: 910/1554 cut-off events. [2024-06-14 14:05:55,437 INFO L125 PetriNetUnfolderBase]: For 12497/12497 co-relation queries the response was YES. [2024-06-14 14:05:55,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6240 conditions, 1554 events. 910/1554 cut-off events. For 12497/12497 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8154 event pairs, 261 based on Foata normal form. 2/1555 useless extension candidates. Maximal degree in co-relation 6198. Up to 1294 conditions per place. [2024-06-14 14:05:55,450 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 76 selfloop transitions, 35 changer transitions 0/117 dead transitions. [2024-06-14 14:05:55,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 117 transitions, 996 flow [2024-06-14 14:05:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:05:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:05:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:05:55,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-14 14:05:55,451 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 544 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:05:55,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 117 transitions, 996 flow [2024-06-14 14:05:55,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 954 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:05:55,469 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 738 flow [2024-06-14 14:05:55,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2024-06-14 14:05:55,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-14 14:05:55,470 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 738 flow [2024-06-14 14:05:55,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:55,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:55,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:05:55,471 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:55,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -433999292, now seen corresponding path program 2 times [2024-06-14 14:05:55,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:55,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144666093] [2024-06-14 14:05:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:55,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144666093] [2024-06-14 14:05:55,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144666093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:55,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15832416] [2024-06-14 14:05:55,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:55,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:55,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:55,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 738 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:55,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:56,105 INFO L124 PetriNetUnfolderBase]: 943/1612 cut-off events. [2024-06-14 14:05:56,105 INFO L125 PetriNetUnfolderBase]: For 13588/13588 co-relation queries the response was YES. [2024-06-14 14:05:56,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 1612 events. 943/1612 cut-off events. For 13588/13588 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8550 event pairs, 258 based on Foata normal form. 2/1614 useless extension candidates. Maximal degree in co-relation 6969. Up to 1431 conditions per place. [2024-06-14 14:05:56,120 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 93 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-14 14:05:56,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 122 transitions, 1142 flow [2024-06-14 14:05:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 14:05:56,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:05:56,122 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 738 flow. Second operand 7 states and 152 transitions. [2024-06-14 14:05:56,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 122 transitions, 1142 flow [2024-06-14 14:05:56,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 122 transitions, 1108 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-06-14 14:05:56,146 INFO L231 Difference]: Finished difference. Result has 96 places, 104 transitions, 876 flow [2024-06-14 14:05:56,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=876, PETRI_PLACES=96, PETRI_TRANSITIONS=104} [2024-06-14 14:05:56,147 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-14 14:05:56,147 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 104 transitions, 876 flow [2024-06-14 14:05:56,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:56,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:56,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:05:56,148 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:56,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:56,148 INFO L85 PathProgramCache]: Analyzing trace with hash 748032061, now seen corresponding path program 1 times [2024-06-14 14:05:56,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:56,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780346235] [2024-06-14 14:05:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:56,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:56,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:56,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780346235] [2024-06-14 14:05:56,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780346235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:56,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:56,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:56,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196161678] [2024-06-14 14:05:56,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:56,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:56,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:56,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:56,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 104 transitions, 876 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:56,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:56,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:56,765 INFO L124 PetriNetUnfolderBase]: 948/1619 cut-off events. [2024-06-14 14:05:56,766 INFO L125 PetriNetUnfolderBase]: For 14769/14769 co-relation queries the response was YES. [2024-06-14 14:05:56,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7146 conditions, 1619 events. 948/1619 cut-off events. For 14769/14769 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8582 event pairs, 257 based on Foata normal form. 1/1620 useless extension candidates. Maximal degree in co-relation 7098. Up to 1441 conditions per place. [2024-06-14 14:05:56,780 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 99 selfloop transitions, 24 changer transitions 0/129 dead transitions. [2024-06-14 14:05:56,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 129 transitions, 1262 flow [2024-06-14 14:05:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 14:05:56,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-14 14:05:56,783 INFO L175 Difference]: Start difference. First operand has 96 places, 104 transitions, 876 flow. Second operand 8 states and 167 transitions. [2024-06-14 14:05:56,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 129 transitions, 1262 flow [2024-06-14 14:05:56,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 129 transitions, 1206 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:56,806 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 940 flow [2024-06-14 14:05:56,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=940, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2024-06-14 14:05:56,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-14 14:05:56,807 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 940 flow [2024-06-14 14:05:56,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:56,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:56,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:56,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:05:56,808 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:56,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1204429133, now seen corresponding path program 2 times [2024-06-14 14:05:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:56,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925599804] [2024-06-14 14:05:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:57,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:57,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925599804] [2024-06-14 14:05:57,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925599804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:57,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:57,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:57,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533112562] [2024-06-14 14:05:57,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:57,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:57,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:57,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:57,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:57,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:57,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 940 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:57,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:57,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:57,449 INFO L124 PetriNetUnfolderBase]: 953/1628 cut-off events. [2024-06-14 14:05:57,450 INFO L125 PetriNetUnfolderBase]: For 16582/16582 co-relation queries the response was YES. [2024-06-14 14:05:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7373 conditions, 1628 events. 953/1628 cut-off events. For 16582/16582 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8604 event pairs, 258 based on Foata normal form. 1/1629 useless extension candidates. Maximal degree in co-relation 7324. Up to 1454 conditions per place. [2024-06-14 14:05:57,469 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 102 selfloop transitions, 19 changer transitions 0/127 dead transitions. [2024-06-14 14:05:57,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 127 transitions, 1254 flow [2024-06-14 14:05:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 14:05:57,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 14:05:57,471 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 940 flow. Second operand 4 states and 100 transitions. [2024-06-14 14:05:57,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 127 transitions, 1254 flow [2024-06-14 14:05:57,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 127 transitions, 1182 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:57,498 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 964 flow [2024-06-14 14:05:57,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=964, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-14 14:05:57,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-14 14:05:57,499 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 964 flow [2024-06-14 14:05:57,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:57,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:57,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:05:57,500 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:57,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1177628393, now seen corresponding path program 3 times [2024-06-14 14:05:57,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:57,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969144251] [2024-06-14 14:05:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:57,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:57,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969144251] [2024-06-14 14:05:57,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969144251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:57,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:57,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:57,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924524722] [2024-06-14 14:05:57,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:57,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:57,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:57,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:57,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 964 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:57,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:57,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:57,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:58,146 INFO L124 PetriNetUnfolderBase]: 950/1624 cut-off events. [2024-06-14 14:05:58,147 INFO L125 PetriNetUnfolderBase]: For 17754/17754 co-relation queries the response was YES. [2024-06-14 14:05:58,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7429 conditions, 1624 events. 950/1624 cut-off events. For 17754/17754 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8609 event pairs, 257 based on Foata normal form. 1/1625 useless extension candidates. Maximal degree in co-relation 7380. Up to 1444 conditions per place. [2024-06-14 14:05:58,164 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 98 selfloop transitions, 26 changer transitions 0/130 dead transitions. [2024-06-14 14:05:58,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 130 transitions, 1254 flow [2024-06-14 14:05:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:58,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:58,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 14:05:58,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2024-06-14 14:05:58,166 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 964 flow. Second operand 7 states and 149 transitions. [2024-06-14 14:05:58,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 130 transitions, 1254 flow [2024-06-14 14:05:58,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 130 transitions, 1194 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 14:05:58,202 INFO L231 Difference]: Finished difference. Result has 105 places, 113 transitions, 966 flow [2024-06-14 14:05:58,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=966, PETRI_PLACES=105, PETRI_TRANSITIONS=113} [2024-06-14 14:05:58,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-14 14:05:58,203 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 113 transitions, 966 flow [2024-06-14 14:05:58,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:58,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:58,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:05:58,204 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:58,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:58,205 INFO L85 PathProgramCache]: Analyzing trace with hash 748722628, now seen corresponding path program 3 times [2024-06-14 14:05:58,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:58,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734180542] [2024-06-14 14:05:58,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:58,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:58,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:58,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734180542] [2024-06-14 14:05:58,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734180542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:58,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:58,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:05:58,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481711687] [2024-06-14 14:05:58,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:58,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:05:58,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:58,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:05:58,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:05:58,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:58,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 113 transitions, 966 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:58,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:58,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:58,791 INFO L124 PetriNetUnfolderBase]: 970/1643 cut-off events. [2024-06-14 14:05:58,791 INFO L125 PetriNetUnfolderBase]: For 19414/19414 co-relation queries the response was YES. [2024-06-14 14:05:58,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7673 conditions, 1643 events. 970/1643 cut-off events. For 19414/19414 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8666 event pairs, 257 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 7623. Up to 1384 conditions per place. [2024-06-14 14:05:58,807 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 47 changer transitions 0/151 dead transitions. [2024-06-14 14:05:58,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 151 transitions, 1445 flow [2024-06-14 14:05:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:05:58,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-14 14:05:58,809 INFO L175 Difference]: Start difference. First operand has 105 places, 113 transitions, 966 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:05:58,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 151 transitions, 1445 flow [2024-06-14 14:05:58,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1377 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:58,842 INFO L231 Difference]: Finished difference. Result has 108 places, 121 transitions, 1135 flow [2024-06-14 14:05:58,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=900, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1135, PETRI_PLACES=108, PETRI_TRANSITIONS=121} [2024-06-14 14:05:58,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-14 14:05:58,843 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 121 transitions, 1135 flow [2024-06-14 14:05:58,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:58,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:58,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:58,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:05:58,844 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:58,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1204040455, now seen corresponding path program 1 times [2024-06-14 14:05:58,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:58,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577707050] [2024-06-14 14:05:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:58,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:59,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:59,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577707050] [2024-06-14 14:05:59,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577707050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:59,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:59,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:05:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629394485] [2024-06-14 14:05:59,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:59,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:05:59,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:59,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:05:59,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:05:59,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:59,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 121 transitions, 1135 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:59,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:59,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:59,452 INFO L124 PetriNetUnfolderBase]: 965/1636 cut-off events. [2024-06-14 14:05:59,453 INFO L125 PetriNetUnfolderBase]: For 19708/19708 co-relation queries the response was YES. [2024-06-14 14:05:59,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1636 events. 965/1636 cut-off events. For 19708/19708 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 8605 event pairs, 257 based on Foata normal form. 2/1638 useless extension candidates. Maximal degree in co-relation 7832. Up to 1489 conditions per place. [2024-06-14 14:05:59,469 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 116 selfloop transitions, 10 changer transitions 0/132 dead transitions. [2024-06-14 14:05:59,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 132 transitions, 1431 flow [2024-06-14 14:05:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:05:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:05:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-14 14:05:59,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:05:59,471 INFO L175 Difference]: Start difference. First operand has 108 places, 121 transitions, 1135 flow. Second operand 4 states and 92 transitions. [2024-06-14 14:05:59,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 132 transitions, 1431 flow [2024-06-14 14:05:59,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 132 transitions, 1361 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 14:05:59,498 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 1116 flow [2024-06-14 14:05:59,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1116, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-06-14 14:05:59,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-14 14:05:59,499 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 1116 flow [2024-06-14 14:05:59,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:59,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:59,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:59,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:05:59,502 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:59,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:59,502 INFO L85 PathProgramCache]: Analyzing trace with hash -577406561, now seen corresponding path program 1 times [2024-06-14 14:05:59,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:59,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118618796] [2024-06-14 14:05:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:59,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:59,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:59,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118618796] [2024-06-14 14:05:59,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118618796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:59,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:59,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:59,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978464288] [2024-06-14 14:05:59,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:59,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:59,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:59,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:59,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:59,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:05:59,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 1116 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:05:59,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:59,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:05:59,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:00,168 INFO L124 PetriNetUnfolderBase]: 983/1668 cut-off events. [2024-06-14 14:06:00,168 INFO L125 PetriNetUnfolderBase]: For 20208/20208 co-relation queries the response was YES. [2024-06-14 14:06:00,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7962 conditions, 1668 events. 983/1668 cut-off events. For 20208/20208 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8850 event pairs, 254 based on Foata normal form. 2/1669 useless extension candidates. Maximal degree in co-relation 7909. Up to 1285 conditions per place. [2024-06-14 14:06:00,185 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 80 selfloop transitions, 79 changer transitions 0/165 dead transitions. [2024-06-14 14:06:00,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 165 transitions, 1778 flow [2024-06-14 14:06:00,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:00,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 14:06:00,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-14 14:06:00,188 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 1116 flow. Second operand 10 states and 221 transitions. [2024-06-14 14:06:00,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 165 transitions, 1778 flow [2024-06-14 14:06:00,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 165 transitions, 1743 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:00,222 INFO L231 Difference]: Finished difference. Result has 118 places, 135 transitions, 1388 flow [2024-06-14 14:06:00,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1388, PETRI_PLACES=118, PETRI_TRANSITIONS=135} [2024-06-14 14:06:00,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-14 14:06:00,223 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 135 transitions, 1388 flow [2024-06-14 14:06:00,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:00,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:06:00,224 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:00,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1709390371, now seen corresponding path program 1 times [2024-06-14 14:06:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029083775] [2024-06-14 14:06:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:00,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029083775] [2024-06-14 14:06:00,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029083775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:00,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:00,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:00,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348625183] [2024-06-14 14:06:00,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:00,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:00,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:00,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:00,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:00,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 135 transitions, 1388 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:00,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:00,849 INFO L124 PetriNetUnfolderBase]: 1001/1693 cut-off events. [2024-06-14 14:06:00,849 INFO L125 PetriNetUnfolderBase]: For 23611/23611 co-relation queries the response was YES. [2024-06-14 14:06:00,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8773 conditions, 1693 events. 1001/1693 cut-off events. For 23611/23611 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8973 event pairs, 259 based on Foata normal form. 2/1694 useless extension candidates. Maximal degree in co-relation 8718. Up to 1390 conditions per place. [2024-06-14 14:06:00,867 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 59 changer transitions 0/165 dead transitions. [2024-06-14 14:06:00,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1966 flow [2024-06-14 14:06:00,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 14:06:00,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-14 14:06:00,869 INFO L175 Difference]: Start difference. First operand has 118 places, 135 transitions, 1388 flow. Second operand 6 states and 143 transitions. [2024-06-14 14:06:00,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1966 flow [2024-06-14 14:06:00,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 165 transitions, 1800 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:00,913 INFO L231 Difference]: Finished difference. Result has 120 places, 144 transitions, 1497 flow [2024-06-14 14:06:00,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1497, PETRI_PLACES=120, PETRI_TRANSITIONS=144} [2024-06-14 14:06:00,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-14 14:06:00,914 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 144 transitions, 1497 flow [2024-06-14 14:06:00,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:00,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:06:00,915 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:00,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1714151971, now seen corresponding path program 2 times [2024-06-14 14:06:00,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737100036] [2024-06-14 14:06:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:01,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:01,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737100036] [2024-06-14 14:06:01,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737100036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:01,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:01,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988184156] [2024-06-14 14:06:01,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:01,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:01,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:01,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:01,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 144 transitions, 1497 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:01,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:01,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:01,525 INFO L124 PetriNetUnfolderBase]: 993/1684 cut-off events. [2024-06-14 14:06:01,525 INFO L125 PetriNetUnfolderBase]: For 24501/24501 co-relation queries the response was YES. [2024-06-14 14:06:01,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8807 conditions, 1684 events. 993/1684 cut-off events. For 24501/24501 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8913 event pairs, 253 based on Foata normal form. 2/1686 useless extension candidates. Maximal degree in co-relation 8750. Up to 1504 conditions per place. [2024-06-14 14:06:01,543 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 23 changer transitions 0/161 dead transitions. [2024-06-14 14:06:01,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 161 transitions, 1849 flow [2024-06-14 14:06:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 14:06:01,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-14 14:06:01,545 INFO L175 Difference]: Start difference. First operand has 120 places, 144 transitions, 1497 flow. Second operand 7 states and 151 transitions. [2024-06-14 14:06:01,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 161 transitions, 1849 flow [2024-06-14 14:06:01,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 161 transitions, 1761 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:01,613 INFO L231 Difference]: Finished difference. Result has 125 places, 144 transitions, 1463 flow [2024-06-14 14:06:01,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1463, PETRI_PLACES=125, PETRI_TRANSITIONS=144} [2024-06-14 14:06:01,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 84 predicate places. [2024-06-14 14:06:01,614 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 144 transitions, 1463 flow [2024-06-14 14:06:01,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:01,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:01,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:01,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:06:01,615 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:01,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:01,615 INFO L85 PathProgramCache]: Analyzing trace with hash -569074691, now seen corresponding path program 2 times [2024-06-14 14:06:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:01,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602519439] [2024-06-14 14:06:01,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:01,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:01,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:01,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602519439] [2024-06-14 14:06:01,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602519439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:01,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:01,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:01,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16330583] [2024-06-14 14:06:01,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:01,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:01,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:01,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:01,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 144 transitions, 1463 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:01,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:01,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:01,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:02,331 INFO L124 PetriNetUnfolderBase]: 1035/1755 cut-off events. [2024-06-14 14:06:02,332 INFO L125 PetriNetUnfolderBase]: For 27269/27269 co-relation queries the response was YES. [2024-06-14 14:06:02,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9117 conditions, 1755 events. 1035/1755 cut-off events. For 27269/27269 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9385 event pairs, 253 based on Foata normal form. 2/1757 useless extension candidates. Maximal degree in co-relation 9059. Up to 1520 conditions per place. [2024-06-14 14:06:02,349 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 46 changer transitions 0/179 dead transitions. [2024-06-14 14:06:02,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 179 transitions, 2047 flow [2024-06-14 14:06:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 14:06:02,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-06-14 14:06:02,351 INFO L175 Difference]: Start difference. First operand has 125 places, 144 transitions, 1463 flow. Second operand 11 states and 224 transitions. [2024-06-14 14:06:02,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 179 transitions, 2047 flow [2024-06-14 14:06:02,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 179 transitions, 2001 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:02,398 INFO L231 Difference]: Finished difference. Result has 131 places, 156 transitions, 1636 flow [2024-06-14 14:06:02,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1636, PETRI_PLACES=131, PETRI_TRANSITIONS=156} [2024-06-14 14:06:02,399 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-14 14:06:02,399 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 156 transitions, 1636 flow [2024-06-14 14:06:02,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:02,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:02,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:02,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:06:02,400 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:02,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:02,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1714158543, now seen corresponding path program 3 times [2024-06-14 14:06:02,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:02,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709903680] [2024-06-14 14:06:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:02,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709903680] [2024-06-14 14:06:02,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709903680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:02,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:02,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37415028] [2024-06-14 14:06:02,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:02,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:02,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:02,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:02,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 156 transitions, 1636 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:02,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:02,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:02,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:03,140 INFO L124 PetriNetUnfolderBase]: 1031/1750 cut-off events. [2024-06-14 14:06:03,140 INFO L125 PetriNetUnfolderBase]: For 28969/28969 co-relation queries the response was YES. [2024-06-14 14:06:03,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9271 conditions, 1750 events. 1031/1750 cut-off events. For 28969/28969 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9376 event pairs, 253 based on Foata normal form. 2/1752 useless extension candidates. Maximal degree in co-relation 9211. Up to 1518 conditions per place. [2024-06-14 14:06:03,157 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 128 selfloop transitions, 44 changer transitions 0/178 dead transitions. [2024-06-14 14:06:03,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 178 transitions, 2080 flow [2024-06-14 14:06:03,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 14:06:03,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-14 14:06:03,159 INFO L175 Difference]: Start difference. First operand has 131 places, 156 transitions, 1636 flow. Second operand 11 states and 223 transitions. [2024-06-14 14:06:03,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 178 transitions, 2080 flow [2024-06-14 14:06:03,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 178 transitions, 2018 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:03,214 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1670 flow [2024-06-14 14:06:03,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1670, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2024-06-14 14:06:03,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-14 14:06:03,218 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1670 flow [2024-06-14 14:06:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:03,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:03,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:03,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:06:03,219 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)] === [2024-06-14 14:06:03,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:03,220 INFO L85 PathProgramCache]: Analyzing trace with hash 2109085897, now seen corresponding path program 3 times [2024-06-14 14:06:03,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:03,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793890227] [2024-06-14 14:06:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:03,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:03,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793890227] [2024-06-14 14:06:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793890227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:03,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18249523] [2024-06-14 14:06:03,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:03,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:03,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:03,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:03,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:03,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1670 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:03,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:03,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:03,807 INFO L124 PetriNetUnfolderBase]: 1036/1752 cut-off events. [2024-06-14 14:06:03,808 INFO L125 PetriNetUnfolderBase]: For 31499/31499 co-relation queries the response was YES. [2024-06-14 14:06:03,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9488 conditions, 1752 events. 1036/1752 cut-off events. For 31499/31499 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9326 event pairs, 279 based on Foata normal form. 1/1752 useless extension candidates. Maximal degree in co-relation 9426. Up to 1439 conditions per place. [2024-06-14 14:06:03,822 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 107 selfloop transitions, 65 changer transitions 0/178 dead transitions. [2024-06-14 14:06:03,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 178 transitions, 2252 flow [2024-06-14 14:06:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 14:06:03,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-14 14:06:03,824 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1670 flow. Second operand 6 states and 141 transitions. [2024-06-14 14:06:03,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 178 transitions, 2252 flow [2024-06-14 14:06:03,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 2169 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:03,880 INFO L231 Difference]: Finished difference. Result has 133 places, 159 transitions, 1765 flow [2024-06-14 14:06:03,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1765, PETRI_PLACES=133, PETRI_TRANSITIONS=159} [2024-06-14 14:06:03,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-14 14:06:03,881 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 159 transitions, 1765 flow [2024-06-14 14:06:03,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:03,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:03,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:03,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:06:03,882 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:03,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:03,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1268763707, now seen corresponding path program 4 times [2024-06-14 14:06:03,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:03,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55157626] [2024-06-14 14:06:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:03,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:04,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55157626] [2024-06-14 14:06:04,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55157626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:04,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:04,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068133748] [2024-06-14 14:06:04,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:04,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:04,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:04,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:04,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 159 transitions, 1765 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:04,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:04,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:04,442 INFO L124 PetriNetUnfolderBase]: 1033/1748 cut-off events. [2024-06-14 14:06:04,442 INFO L125 PetriNetUnfolderBase]: For 33487/33487 co-relation queries the response was YES. [2024-06-14 14:06:04,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 1748 events. 1033/1748 cut-off events. For 33487/33487 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9331 event pairs, 280 based on Foata normal form. 1/1748 useless extension candidates. Maximal degree in co-relation 9551. Up to 1437 conditions per place. [2024-06-14 14:06:04,461 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 103 selfloop transitions, 65 changer transitions 0/174 dead transitions. [2024-06-14 14:06:04,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 174 transitions, 2241 flow [2024-06-14 14:06:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:04,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 14:06:04,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:06:04,464 INFO L175 Difference]: Start difference. First operand has 133 places, 159 transitions, 1765 flow. Second operand 6 states and 138 transitions. [2024-06-14 14:06:04,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 174 transitions, 2241 flow [2024-06-14 14:06:04,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 174 transitions, 2012 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:04,525 INFO L231 Difference]: Finished difference. Result has 133 places, 159 transitions, 1672 flow [2024-06-14 14:06:04,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1672, PETRI_PLACES=133, PETRI_TRANSITIONS=159} [2024-06-14 14:06:04,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-14 14:06:04,527 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 159 transitions, 1672 flow [2024-06-14 14:06:04,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:04,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:06:04,527 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1322765061, now seen corresponding path program 5 times [2024-06-14 14:06:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:04,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082301736] [2024-06-14 14:06:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:04,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:04,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:04,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082301736] [2024-06-14 14:06:04,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082301736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:04,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:04,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871629675] [2024-06-14 14:06:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:04,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:04,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:04,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:04,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:04,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 159 transitions, 1672 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:04,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:04,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:04,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:05,135 INFO L124 PetriNetUnfolderBase]: 1030/1751 cut-off events. [2024-06-14 14:06:05,136 INFO L125 PetriNetUnfolderBase]: For 34186/34192 co-relation queries the response was YES. [2024-06-14 14:06:05,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9488 conditions, 1751 events. 1030/1751 cut-off events. For 34186/34192 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9401 event pairs, 262 based on Foata normal form. 7/1758 useless extension candidates. Maximal degree in co-relation 9426. Up to 1468 conditions per place. [2024-06-14 14:06:05,153 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 128 selfloop transitions, 48 changer transitions 0/182 dead transitions. [2024-06-14 14:06:05,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 182 transitions, 2136 flow [2024-06-14 14:06:05,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:06:05,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 14:06:05,155 INFO L175 Difference]: Start difference. First operand has 133 places, 159 transitions, 1672 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:06:05,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 182 transitions, 2136 flow [2024-06-14 14:06:05,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 182 transitions, 1985 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:05,223 INFO L231 Difference]: Finished difference. Result has 135 places, 159 transitions, 1627 flow [2024-06-14 14:06:05,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1627, PETRI_PLACES=135, PETRI_TRANSITIONS=159} [2024-06-14 14:06:05,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-14 14:06:05,224 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 159 transitions, 1627 flow [2024-06-14 14:06:05,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:05,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:05,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:06:05,225 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:05,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:05,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1317051141, now seen corresponding path program 6 times [2024-06-14 14:06:05,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:05,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077335765] [2024-06-14 14:06:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:05,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:05,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:05,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077335765] [2024-06-14 14:06:05,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077335765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:05,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:05,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:05,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178080251] [2024-06-14 14:06:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:05,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:05,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:05,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 159 transitions, 1627 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:05,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:05,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:05,851 INFO L124 PetriNetUnfolderBase]: 1022/1737 cut-off events. [2024-06-14 14:06:05,851 INFO L125 PetriNetUnfolderBase]: For 35299/35299 co-relation queries the response was YES. [2024-06-14 14:06:05,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9365 conditions, 1737 events. 1022/1737 cut-off events. For 35299/35299 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9311 event pairs, 253 based on Foata normal form. 2/1739 useless extension candidates. Maximal degree in co-relation 9303. Up to 1460 conditions per place. [2024-06-14 14:06:05,869 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 134 selfloop transitions, 48 changer transitions 0/188 dead transitions. [2024-06-14 14:06:05,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 188 transitions, 2065 flow [2024-06-14 14:06:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:06:05,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-14 14:06:05,871 INFO L175 Difference]: Start difference. First operand has 135 places, 159 transitions, 1627 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:06:05,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 188 transitions, 2065 flow [2024-06-14 14:06:05,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 188 transitions, 1977 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:05,932 INFO L231 Difference]: Finished difference. Result has 137 places, 159 transitions, 1655 flow [2024-06-14 14:06:05,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1655, PETRI_PLACES=137, PETRI_TRANSITIONS=159} [2024-06-14 14:06:05,934 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-14 14:06:05,934 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 159 transitions, 1655 flow [2024-06-14 14:06:05,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:05,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:05,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:05,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:06:05,935 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:05,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1317057713, now seen corresponding path program 4 times [2024-06-14 14:06:05,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:05,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643393117] [2024-06-14 14:06:05,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:05,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:06,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:06,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643393117] [2024-06-14 14:06:06,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643393117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:06,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:06,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:06,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141502948] [2024-06-14 14:06:06,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:06,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:06,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:06,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:06,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 159 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:06,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:06,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:06,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:06,693 INFO L124 PetriNetUnfolderBase]: 1090/1848 cut-off events. [2024-06-14 14:06:06,693 INFO L125 PetriNetUnfolderBase]: For 38238/38238 co-relation queries the response was YES. [2024-06-14 14:06:06,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10105 conditions, 1848 events. 1090/1848 cut-off events. For 38238/38238 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9978 event pairs, 256 based on Foata normal form. 2/1850 useless extension candidates. Maximal degree in co-relation 10043. Up to 1458 conditions per place. [2024-06-14 14:06:06,712 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 120 selfloop transitions, 84 changer transitions 0/210 dead transitions. [2024-06-14 14:06:06,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 210 transitions, 2431 flow [2024-06-14 14:06:06,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:06,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 14:06:06,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-14 14:06:06,714 INFO L175 Difference]: Start difference. First operand has 137 places, 159 transitions, 1655 flow. Second operand 11 states and 237 transitions. [2024-06-14 14:06:06,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 210 transitions, 2431 flow [2024-06-14 14:06:06,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 210 transitions, 2277 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:06,771 INFO L231 Difference]: Finished difference. Result has 140 places, 176 transitions, 1874 flow [2024-06-14 14:06:06,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1874, PETRI_PLACES=140, PETRI_TRANSITIONS=176} [2024-06-14 14:06:06,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-14 14:06:06,771 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 176 transitions, 1874 flow [2024-06-14 14:06:06,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:06,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:06,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:06,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:06:06,772 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:06,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1329022163, now seen corresponding path program 5 times [2024-06-14 14:06:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:06,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739712242] [2024-06-14 14:06:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:07,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:07,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739712242] [2024-06-14 14:06:07,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739712242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:07,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152181215] [2024-06-14 14:06:07,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:07,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:07,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:07,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:07,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 176 transitions, 1874 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:07,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:07,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:07,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:07,507 INFO L124 PetriNetUnfolderBase]: 1086/1844 cut-off events. [2024-06-14 14:06:07,507 INFO L125 PetriNetUnfolderBase]: For 35622/35622 co-relation queries the response was YES. [2024-06-14 14:06:07,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10136 conditions, 1844 events. 1086/1844 cut-off events. For 35622/35622 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9972 event pairs, 255 based on Foata normal form. 2/1846 useless extension candidates. Maximal degree in co-relation 10074. Up to 1536 conditions per place. [2024-06-14 14:06:07,521 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 146 selfloop transitions, 52 changer transitions 0/204 dead transitions. [2024-06-14 14:06:07,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 204 transitions, 2428 flow [2024-06-14 14:06:07,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 14:06:07,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-14 14:06:07,523 INFO L175 Difference]: Start difference. First operand has 140 places, 176 transitions, 1874 flow. Second operand 6 states and 151 transitions. [2024-06-14 14:06:07,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 204 transitions, 2428 flow [2024-06-14 14:06:07,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 204 transitions, 2353 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:07,571 INFO L231 Difference]: Finished difference. Result has 140 places, 178 transitions, 2002 flow [2024-06-14 14:06:07,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2002, PETRI_PLACES=140, PETRI_TRANSITIONS=178} [2024-06-14 14:06:07,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-14 14:06:07,572 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 178 transitions, 2002 flow [2024-06-14 14:06:07,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:07,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:07,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:07,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:06:07,572 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:07,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:07,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1317047483, now seen corresponding path program 6 times [2024-06-14 14:06:07,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:07,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859843763] [2024-06-14 14:06:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:07,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:07,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859843763] [2024-06-14 14:06:07,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859843763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:07,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:07,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:07,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967128774] [2024-06-14 14:06:07,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:07,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:07,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:07,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 178 transitions, 2002 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:07,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:07,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:07,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:08,221 INFO L124 PetriNetUnfolderBase]: 1080/1836 cut-off events. [2024-06-14 14:06:08,222 INFO L125 PetriNetUnfolderBase]: For 35423/35423 co-relation queries the response was YES. [2024-06-14 14:06:08,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10301 conditions, 1836 events. 1080/1836 cut-off events. For 35423/35423 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9949 event pairs, 253 based on Foata normal form. 2/1838 useless extension candidates. Maximal degree in co-relation 10237. Up to 1451 conditions per place. [2024-06-14 14:06:08,234 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 112 selfloop transitions, 93 changer transitions 0/211 dead transitions. [2024-06-14 14:06:08,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 211 transitions, 2548 flow [2024-06-14 14:06:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 14:06:08,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-14 14:06:08,235 INFO L175 Difference]: Start difference. First operand has 140 places, 178 transitions, 2002 flow. Second operand 10 states and 222 transitions. [2024-06-14 14:06:08,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 211 transitions, 2548 flow [2024-06-14 14:06:08,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 211 transitions, 2439 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:08,292 INFO L231 Difference]: Finished difference. Result has 145 places, 178 transitions, 2091 flow [2024-06-14 14:06:08,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1893, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2091, PETRI_PLACES=145, PETRI_TRANSITIONS=178} [2024-06-14 14:06:08,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-14 14:06:08,293 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 178 transitions, 2091 flow [2024-06-14 14:06:08,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:08,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:08,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:08,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:06:08,293 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:08,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:08,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1381840605, now seen corresponding path program 1 times [2024-06-14 14:06:08,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:08,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175064714] [2024-06-14 14:06:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:08,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:08,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:08,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175064714] [2024-06-14 14:06:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175064714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:08,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:08,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88730865] [2024-06-14 14:06:08,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:08,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:08,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:06:08,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 178 transitions, 2091 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 14:06:08,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:08,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:06:08,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:08,997 INFO L124 PetriNetUnfolderBase]: 1072/1862 cut-off events. [2024-06-14 14:06:08,997 INFO L125 PetriNetUnfolderBase]: For 37852/37876 co-relation queries the response was YES. [2024-06-14 14:06:09,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10465 conditions, 1862 events. 1072/1862 cut-off events. For 37852/37876 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10417 event pairs, 209 based on Foata normal form. 6/1847 useless extension candidates. Maximal degree in co-relation 10402. Up to 1483 conditions per place. [2024-06-14 14:06:09,014 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 157 selfloop transitions, 24 changer transitions 0/204 dead transitions. [2024-06-14 14:06:09,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 204 transitions, 2609 flow [2024-06-14 14:06:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 14:06:09,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-14 14:06:09,015 INFO L175 Difference]: Start difference. First operand has 145 places, 178 transitions, 2091 flow. Second operand 6 states and 142 transitions. [2024-06-14 14:06:09,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 204 transitions, 2609 flow [2024-06-14 14:06:09,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 204 transitions, 2448 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:09,064 INFO L231 Difference]: Finished difference. Result has 143 places, 180 transitions, 2006 flow [2024-06-14 14:06:09,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1932, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2006, PETRI_PLACES=143, PETRI_TRANSITIONS=180} [2024-06-14 14:06:09,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 102 predicate places. [2024-06-14 14:06:09,065 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 180 transitions, 2006 flow [2024-06-14 14:06:09,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 14:06:09,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:09,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:09,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:06:09,066 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:09,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:09,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1378983645, now seen corresponding path program 2 times [2024-06-14 14:06:09,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:09,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452142353] [2024-06-14 14:06:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:09,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:09,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:09,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452142353] [2024-06-14 14:06:09,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452142353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:09,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:09,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:09,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555917119] [2024-06-14 14:06:09,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:09,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:09,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:09,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:09,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:09,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:06:09,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 180 transitions, 2006 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 14:06:09,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:09,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:06:09,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:09,609 INFO L124 PetriNetUnfolderBase]: 1107/1917 cut-off events. [2024-06-14 14:06:09,610 INFO L125 PetriNetUnfolderBase]: For 39600/39624 co-relation queries the response was YES. [2024-06-14 14:06:09,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10539 conditions, 1917 events. 1107/1917 cut-off events. For 39600/39624 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10769 event pairs, 239 based on Foata normal form. 10/1906 useless extension candidates. Maximal degree in co-relation 10476. Up to 1605 conditions per place. [2024-06-14 14:06:09,628 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 153 selfloop transitions, 22 changer transitions 0/198 dead transitions. [2024-06-14 14:06:09,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 198 transitions, 2424 flow [2024-06-14 14:06:09,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:09,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 14:06:09,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:06:09,630 INFO L175 Difference]: Start difference. First operand has 143 places, 180 transitions, 2006 flow. Second operand 6 states and 136 transitions. [2024-06-14 14:06:09,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 198 transitions, 2424 flow [2024-06-14 14:06:09,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 2397 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:09,687 INFO L231 Difference]: Finished difference. Result has 147 places, 181 transitions, 2043 flow [2024-06-14 14:06:09,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2043, PETRI_PLACES=147, PETRI_TRANSITIONS=181} [2024-06-14 14:06:09,688 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 106 predicate places. [2024-06-14 14:06:09,688 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 181 transitions, 2043 flow [2024-06-14 14:06:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 14:06:09,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:09,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:09,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:06:09,689 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:09,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -42352951, now seen corresponding path program 3 times [2024-06-14 14:06:09,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:09,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612789173] [2024-06-14 14:06:09,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:09,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:09,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:09,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612789173] [2024-06-14 14:06:09,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612789173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:09,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:09,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:09,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736531308] [2024-06-14 14:06:09,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:09,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:09,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:10,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-14 14:06:10,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 181 transitions, 2043 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 14:06:10,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:10,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-14 14:06:10,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:10,261 INFO L124 PetriNetUnfolderBase]: 1086/1886 cut-off events. [2024-06-14 14:06:10,261 INFO L125 PetriNetUnfolderBase]: For 37777/37801 co-relation queries the response was YES. [2024-06-14 14:06:10,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 1886 events. 1086/1886 cut-off events. For 37777/37801 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10553 event pairs, 204 based on Foata normal form. 10/1875 useless extension candidates. Maximal degree in co-relation 10211. Up to 1559 conditions per place. [2024-06-14 14:06:10,276 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 158 selfloop transitions, 19 changer transitions 0/200 dead transitions. [2024-06-14 14:06:10,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 200 transitions, 2459 flow [2024-06-14 14:06:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:10,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:10,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 14:06:10,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 14:06:10,278 INFO L175 Difference]: Start difference. First operand has 147 places, 181 transitions, 2043 flow. Second operand 5 states and 122 transitions. [2024-06-14 14:06:10,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 200 transitions, 2459 flow [2024-06-14 14:06:10,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 200 transitions, 2413 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:10,332 INFO L231 Difference]: Finished difference. Result has 148 places, 181 transitions, 2044 flow [2024-06-14 14:06:10,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2044, PETRI_PLACES=148, PETRI_TRANSITIONS=181} [2024-06-14 14:06:10,333 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-14 14:06:10,333 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 181 transitions, 2044 flow [2024-06-14 14:06:10,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-14 14:06:10,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:10,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:10,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:06:10,333 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:10,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash -727361183, now seen corresponding path program 1 times [2024-06-14 14:06:10,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:10,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300314711] [2024-06-14 14:06:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:10,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:10,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:10,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:10,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300314711] [2024-06-14 14:06:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300314711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:10,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:10,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514593409] [2024-06-14 14:06:10,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:10,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:10,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:10,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:10,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 181 transitions, 2044 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:10,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:10,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:11,038 INFO L124 PetriNetUnfolderBase]: 1236/2080 cut-off events. [2024-06-14 14:06:11,038 INFO L125 PetriNetUnfolderBase]: For 48956/48956 co-relation queries the response was YES. [2024-06-14 14:06:11,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11548 conditions, 2080 events. 1236/2080 cut-off events. For 48956/48956 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11442 event pairs, 216 based on Foata normal form. 10/2089 useless extension candidates. Maximal degree in co-relation 11482. Up to 1501 conditions per place. [2024-06-14 14:06:11,073 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 146 selfloop transitions, 70 changer transitions 0/222 dead transitions. [2024-06-14 14:06:11,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 222 transitions, 2816 flow [2024-06-14 14:06:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:11,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:06:11,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-14 14:06:11,075 INFO L175 Difference]: Start difference. First operand has 148 places, 181 transitions, 2044 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:06:11,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 222 transitions, 2816 flow [2024-06-14 14:06:11,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 222 transitions, 2772 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:11,162 INFO L231 Difference]: Finished difference. Result has 151 places, 185 transitions, 2193 flow [2024-06-14 14:06:11,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2000, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2193, PETRI_PLACES=151, PETRI_TRANSITIONS=185} [2024-06-14 14:06:11,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-14 14:06:11,163 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 185 transitions, 2193 flow [2024-06-14 14:06:11,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:11,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:11,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:06:11,163 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)] === [2024-06-14 14:06:11,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash -719742623, now seen corresponding path program 2 times [2024-06-14 14:06:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:11,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643185721] [2024-06-14 14:06:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:11,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:11,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:11,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643185721] [2024-06-14 14:06:11,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643185721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:11,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:11,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:11,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861541302] [2024-06-14 14:06:11,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:11,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:11,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:11,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:11,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 185 transitions, 2193 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:11,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:11,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:11,740 INFO L124 PetriNetUnfolderBase]: 1272/2135 cut-off events. [2024-06-14 14:06:11,740 INFO L125 PetriNetUnfolderBase]: For 52729/52729 co-relation queries the response was YES. [2024-06-14 14:06:11,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12137 conditions, 2135 events. 1272/2135 cut-off events. For 52729/52729 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11836 event pairs, 298 based on Foata normal form. 10/2144 useless extension candidates. Maximal degree in co-relation 12070. Up to 1770 conditions per place. [2024-06-14 14:06:11,756 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 67 changer transitions 0/216 dead transitions. [2024-06-14 14:06:11,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 216 transitions, 2847 flow [2024-06-14 14:06:11,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:06:11,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-14 14:06:11,757 INFO L175 Difference]: Start difference. First operand has 151 places, 185 transitions, 2193 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:06:11,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 216 transitions, 2847 flow [2024-06-14 14:06:11,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2747 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:11,828 INFO L231 Difference]: Finished difference. Result has 155 places, 187 transitions, 2263 flow [2024-06-14 14:06:11,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2263, PETRI_PLACES=155, PETRI_TRANSITIONS=187} [2024-06-14 14:06:11,828 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-14 14:06:11,828 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 187 transitions, 2263 flow [2024-06-14 14:06:11,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:11,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:11,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:06:11,829 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:11,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:11,829 INFO L85 PathProgramCache]: Analyzing trace with hash -719739647, now seen corresponding path program 1 times [2024-06-14 14:06:11,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:11,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074354193] [2024-06-14 14:06:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:11,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:12,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:12,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074354193] [2024-06-14 14:06:12,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074354193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:12,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:12,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:12,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178215953] [2024-06-14 14:06:12,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:12,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:12,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:12,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:12,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 187 transitions, 2263 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:12,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:12,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:12,427 INFO L124 PetriNetUnfolderBase]: 1269/2131 cut-off events. [2024-06-14 14:06:12,427 INFO L125 PetriNetUnfolderBase]: For 50197/50197 co-relation queries the response was YES. [2024-06-14 14:06:12,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12361 conditions, 2131 events. 1269/2131 cut-off events. For 50197/50197 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11803 event pairs, 299 based on Foata normal form. 1/2131 useless extension candidates. Maximal degree in co-relation 12292. Up to 1805 conditions per place. [2024-06-14 14:06:12,446 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 140 selfloop transitions, 65 changer transitions 0/211 dead transitions. [2024-06-14 14:06:12,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 211 transitions, 2797 flow [2024-06-14 14:06:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 14:06:12,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-14 14:06:12,457 INFO L175 Difference]: Start difference. First operand has 155 places, 187 transitions, 2263 flow. Second operand 7 states and 162 transitions. [2024-06-14 14:06:12,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 211 transitions, 2797 flow [2024-06-14 14:06:12,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 211 transitions, 2657 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:12,544 INFO L231 Difference]: Finished difference. Result has 157 places, 187 transitions, 2259 flow [2024-06-14 14:06:12,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2259, PETRI_PLACES=157, PETRI_TRANSITIONS=187} [2024-06-14 14:06:12,545 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-14 14:06:12,545 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 187 transitions, 2259 flow [2024-06-14 14:06:12,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:12,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:12,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:06:12,545 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:12,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:12,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1878736251, now seen corresponding path program 3 times [2024-06-14 14:06:12,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:12,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245925] [2024-06-14 14:06:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:12,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245925] [2024-06-14 14:06:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:12,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:12,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436421723] [2024-06-14 14:06:12,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:12,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:12,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:12,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:12,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:12,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 187 transitions, 2259 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:12,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:12,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:13,234 INFO L124 PetriNetUnfolderBase]: 1305/2190 cut-off events. [2024-06-14 14:06:13,235 INFO L125 PetriNetUnfolderBase]: For 57828/57828 co-relation queries the response was YES. [2024-06-14 14:06:13,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12649 conditions, 2190 events. 1305/2190 cut-off events. For 57828/57828 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12186 event pairs, 299 based on Foata normal form. 10/2200 useless extension candidates. Maximal degree in co-relation 12579. Up to 1940 conditions per place. [2024-06-14 14:06:13,259 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 180 selfloop transitions, 25 changer transitions 0/211 dead transitions. [2024-06-14 14:06:13,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 211 transitions, 2763 flow [2024-06-14 14:06:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 14:06:13,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534375 [2024-06-14 14:06:13,261 INFO L175 Difference]: Start difference. First operand has 157 places, 187 transitions, 2259 flow. Second operand 8 states and 171 transitions. [2024-06-14 14:06:13,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 211 transitions, 2763 flow [2024-06-14 14:06:13,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 211 transitions, 2579 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:13,363 INFO L231 Difference]: Finished difference. Result has 158 places, 189 transitions, 2163 flow [2024-06-14 14:06:13,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2163, PETRI_PLACES=158, PETRI_TRANSITIONS=189} [2024-06-14 14:06:13,364 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-14 14:06:13,364 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 189 transitions, 2163 flow [2024-06-14 14:06:13,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:13,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:13,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:06:13,365 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:13,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:13,365 INFO L85 PathProgramCache]: Analyzing trace with hash -608941307, now seen corresponding path program 2 times [2024-06-14 14:06:13,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:13,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70137081] [2024-06-14 14:06:13,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:13,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:13,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:13,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70137081] [2024-06-14 14:06:13,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70137081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:13,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:13,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:13,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332849196] [2024-06-14 14:06:13,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:13,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:13,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:13,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:13,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:13,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:13,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 189 transitions, 2163 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:13,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:13,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:13,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:14,007 INFO L124 PetriNetUnfolderBase]: 1310/2200 cut-off events. [2024-06-14 14:06:14,007 INFO L125 PetriNetUnfolderBase]: For 55150/55150 co-relation queries the response was YES. [2024-06-14 14:06:14,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12622 conditions, 2200 events. 1310/2200 cut-off events. For 55150/55150 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12284 event pairs, 304 based on Foata normal form. 1/2200 useless extension candidates. Maximal degree in co-relation 12552. Up to 1867 conditions per place. [2024-06-14 14:06:14,026 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 143 selfloop transitions, 64 changer transitions 0/213 dead transitions. [2024-06-14 14:06:14,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 213 transitions, 2725 flow [2024-06-14 14:06:14,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 14:06:14,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-14 14:06:14,027 INFO L175 Difference]: Start difference. First operand has 158 places, 189 transitions, 2163 flow. Second operand 7 states and 159 transitions. [2024-06-14 14:06:14,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 213 transitions, 2725 flow [2024-06-14 14:06:14,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 213 transitions, 2665 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:14,115 INFO L231 Difference]: Finished difference. Result has 159 places, 192 transitions, 2265 flow [2024-06-14 14:06:14,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=159, PETRI_TRANSITIONS=192} [2024-06-14 14:06:14,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-14 14:06:14,116 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 192 transitions, 2265 flow [2024-06-14 14:06:14,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:14,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:14,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:14,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:06:14,117 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:14,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:14,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1499180700, now seen corresponding path program 1 times [2024-06-14 14:06:14,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:14,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736887037] [2024-06-14 14:06:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:14,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:14,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:14,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736887037] [2024-06-14 14:06:14,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736887037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:14,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:14,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:14,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239460378] [2024-06-14 14:06:14,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:14,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:14,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:14,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:14,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:14,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:14,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 192 transitions, 2265 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:14,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:14,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:14,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:14,781 INFO L124 PetriNetUnfolderBase]: 1336/2240 cut-off events. [2024-06-14 14:06:14,781 INFO L125 PetriNetUnfolderBase]: For 60331/60331 co-relation queries the response was YES. [2024-06-14 14:06:14,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13106 conditions, 2240 events. 1336/2240 cut-off events. For 60331/60331 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12529 event pairs, 300 based on Foata normal form. 2/2241 useless extension candidates. Maximal degree in co-relation 13035. Up to 1762 conditions per place. [2024-06-14 14:06:14,800 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 94 selfloop transitions, 130 changer transitions 0/230 dead transitions. [2024-06-14 14:06:14,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 230 transitions, 3143 flow [2024-06-14 14:06:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 14:06:14,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-14 14:06:14,802 INFO L175 Difference]: Start difference. First operand has 159 places, 192 transitions, 2265 flow. Second operand 10 states and 217 transitions. [2024-06-14 14:06:14,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 230 transitions, 3143 flow [2024-06-14 14:06:14,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 230 transitions, 3047 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:14,940 INFO L231 Difference]: Finished difference. Result has 166 places, 204 transitions, 2627 flow [2024-06-14 14:06:14,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2627, PETRI_PLACES=166, PETRI_TRANSITIONS=204} [2024-06-14 14:06:14,940 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-14 14:06:14,940 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 204 transitions, 2627 flow [2024-06-14 14:06:14,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:14,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:14,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:14,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:06:14,941 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:14,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash -461331366, now seen corresponding path program 2 times [2024-06-14 14:06:14,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:14,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768762390] [2024-06-14 14:06:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:14,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:15,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768762390] [2024-06-14 14:06:15,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768762390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:15,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:15,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:15,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769132739] [2024-06-14 14:06:15,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:15,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:15,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:15,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:15,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 204 transitions, 2627 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:15,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:15,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:15,637 INFO L124 PetriNetUnfolderBase]: 1346/2265 cut-off events. [2024-06-14 14:06:15,637 INFO L125 PetriNetUnfolderBase]: For 64141/64141 co-relation queries the response was YES. [2024-06-14 14:06:15,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13652 conditions, 2265 events. 1346/2265 cut-off events. For 64141/64141 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12713 event pairs, 296 based on Foata normal form. 2/2267 useless extension candidates. Maximal degree in co-relation 13579. Up to 1992 conditions per place. [2024-06-14 14:06:15,656 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 174 selfloop transitions, 50 changer transitions 0/230 dead transitions. [2024-06-14 14:06:15,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 230 transitions, 3274 flow [2024-06-14 14:06:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 14:06:15,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5068181818181818 [2024-06-14 14:06:15,658 INFO L175 Difference]: Start difference. First operand has 166 places, 204 transitions, 2627 flow. Second operand 11 states and 223 transitions. [2024-06-14 14:06:15,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 230 transitions, 3274 flow [2024-06-14 14:06:15,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 230 transitions, 3065 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:15,753 INFO L231 Difference]: Finished difference. Result has 171 places, 208 transitions, 2600 flow [2024-06-14 14:06:15,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2600, PETRI_PLACES=171, PETRI_TRANSITIONS=208} [2024-06-14 14:06:15,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-14 14:06:15,753 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 208 transitions, 2600 flow [2024-06-14 14:06:15,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:15,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:15,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:15,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:06:15,754 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)] === [2024-06-14 14:06:15,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1878405574, now seen corresponding path program 3 times [2024-06-14 14:06:15,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:15,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450620978] [2024-06-14 14:06:15,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:15,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:16,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:16,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450620978] [2024-06-14 14:06:16,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450620978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:16,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:16,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892823320] [2024-06-14 14:06:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:16,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:16,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 208 transitions, 2600 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:16,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:16,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:16,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:16,460 INFO L124 PetriNetUnfolderBase]: 1338/2253 cut-off events. [2024-06-14 14:06:16,460 INFO L125 PetriNetUnfolderBase]: For 65357/65357 co-relation queries the response was YES. [2024-06-14 14:06:16,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13331 conditions, 2253 events. 1338/2253 cut-off events. For 65357/65357 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 12666 event pairs, 296 based on Foata normal form. 2/2255 useless extension candidates. Maximal degree in co-relation 13257. Up to 1984 conditions per place. [2024-06-14 14:06:16,480 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 48 changer transitions 0/229 dead transitions. [2024-06-14 14:06:16,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 229 transitions, 3096 flow [2024-06-14 14:06:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:16,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 14:06:16,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-06-14 14:06:16,481 INFO L175 Difference]: Start difference. First operand has 171 places, 208 transitions, 2600 flow. Second operand 11 states and 222 transitions. [2024-06-14 14:06:16,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 229 transitions, 3096 flow [2024-06-14 14:06:16,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 229 transitions, 2978 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:16,583 INFO L231 Difference]: Finished difference. Result has 173 places, 208 transitions, 2587 flow [2024-06-14 14:06:16,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2587, PETRI_PLACES=173, PETRI_TRANSITIONS=208} [2024-06-14 14:06:16,584 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-14 14:06:16,584 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 208 transitions, 2587 flow [2024-06-14 14:06:16,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:16,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:16,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:16,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:06:16,584 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)] === [2024-06-14 14:06:16,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:16,585 INFO L85 PathProgramCache]: Analyzing trace with hash -461116040, now seen corresponding path program 1 times [2024-06-14 14:06:16,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:16,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345554599] [2024-06-14 14:06:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:16,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345554599] [2024-06-14 14:06:16,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345554599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:16,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:16,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:16,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126979163] [2024-06-14 14:06:16,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:16,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:16,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:16,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:16,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:16,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 208 transitions, 2587 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:16,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:16,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:16,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:17,220 INFO L124 PetriNetUnfolderBase]: 1346/2265 cut-off events. [2024-06-14 14:06:17,220 INFO L125 PetriNetUnfolderBase]: For 68623/68623 co-relation queries the response was YES. [2024-06-14 14:06:17,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13490 conditions, 2265 events. 1346/2265 cut-off events. For 68623/68623 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12741 event pairs, 296 based on Foata normal form. 2/2267 useless extension candidates. Maximal degree in co-relation 13415. Up to 2030 conditions per place. [2024-06-14 14:06:17,239 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 195 selfloop transitions, 29 changer transitions 0/230 dead transitions. [2024-06-14 14:06:17,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 230 transitions, 3119 flow [2024-06-14 14:06:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 14:06:17,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-14 14:06:17,241 INFO L175 Difference]: Start difference. First operand has 173 places, 208 transitions, 2587 flow. Second operand 9 states and 183 transitions. [2024-06-14 14:06:17,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 230 transitions, 3119 flow [2024-06-14 14:06:17,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 230 transitions, 3002 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:06:17,346 INFO L231 Difference]: Finished difference. Result has 171 places, 210 transitions, 2573 flow [2024-06-14 14:06:17,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2573, PETRI_PLACES=171, PETRI_TRANSITIONS=210} [2024-06-14 14:06:17,347 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-14 14:06:17,347 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 210 transitions, 2573 flow [2024-06-14 14:06:17,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:17,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:17,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:06:17,348 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)] === [2024-06-14 14:06:17,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2121209403, now seen corresponding path program 4 times [2024-06-14 14:06:17,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73658771] [2024-06-14 14:06:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73658771] [2024-06-14 14:06:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73658771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:17,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:17,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:17,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758137597] [2024-06-14 14:06:17,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:17,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:17,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:17,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:17,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:17,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:17,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 210 transitions, 2573 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:17,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:17,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:17,973 INFO L124 PetriNetUnfolderBase]: 1369/2302 cut-off events. [2024-06-14 14:06:17,973 INFO L125 PetriNetUnfolderBase]: For 76601/76601 co-relation queries the response was YES. [2024-06-14 14:06:17,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13631 conditions, 2302 events. 1369/2302 cut-off events. For 76601/76601 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12968 event pairs, 221 based on Foata normal form. 10/2312 useless extension candidates. Maximal degree in co-relation 13555. Up to 1790 conditions per place. [2024-06-14 14:06:17,992 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 186 selfloop transitions, 56 changer transitions 0/248 dead transitions. [2024-06-14 14:06:17,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 248 transitions, 3173 flow [2024-06-14 14:06:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:06:17,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-14 14:06:17,993 INFO L175 Difference]: Start difference. First operand has 171 places, 210 transitions, 2573 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:06:17,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 248 transitions, 3173 flow [2024-06-14 14:06:18,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 248 transitions, 3086 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:18,101 INFO L231 Difference]: Finished difference. Result has 172 places, 211 transitions, 2624 flow [2024-06-14 14:06:18,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2624, PETRI_PLACES=172, PETRI_TRANSITIONS=211} [2024-06-14 14:06:18,102 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-14 14:06:18,102 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 211 transitions, 2624 flow [2024-06-14 14:06:18,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:18,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:18,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:06:18,102 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:18,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:18,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1239716471, now seen corresponding path program 3 times [2024-06-14 14:06:18,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:18,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383468873] [2024-06-14 14:06:18,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:18,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383468873] [2024-06-14 14:06:18,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383468873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775439197] [2024-06-14 14:06:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:18,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:18,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:18,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 211 transitions, 2624 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:18,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:18,702 INFO L124 PetriNetUnfolderBase]: 1374/2305 cut-off events. [2024-06-14 14:06:18,702 INFO L125 PetriNetUnfolderBase]: For 74654/74654 co-relation queries the response was YES. [2024-06-14 14:06:18,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13969 conditions, 2305 events. 1374/2305 cut-off events. For 74654/74654 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12987 event pairs, 327 based on Foata normal form. 1/2305 useless extension candidates. Maximal degree in co-relation 13892. Up to 1961 conditions per place. [2024-06-14 14:06:18,725 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 155 selfloop transitions, 71 changer transitions 0/232 dead transitions. [2024-06-14 14:06:18,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 232 transitions, 3232 flow [2024-06-14 14:06:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 14:06:18,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 14:06:18,726 INFO L175 Difference]: Start difference. First operand has 172 places, 211 transitions, 2624 flow. Second operand 7 states and 156 transitions. [2024-06-14 14:06:18,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 232 transitions, 3232 flow [2024-06-14 14:06:18,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 232 transitions, 3114 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:18,870 INFO L231 Difference]: Finished difference. Result has 173 places, 214 transitions, 2688 flow [2024-06-14 14:06:18,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2508, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2688, PETRI_PLACES=173, PETRI_TRANSITIONS=214} [2024-06-14 14:06:18,870 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-14 14:06:18,871 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 214 transitions, 2688 flow [2024-06-14 14:06:18,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:18,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:18,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:06:18,871 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:18,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -443301832, now seen corresponding path program 4 times [2024-06-14 14:06:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:18,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785719744] [2024-06-14 14:06:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:19,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:19,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785719744] [2024-06-14 14:06:19,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785719744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:19,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:19,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:19,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387900904] [2024-06-14 14:06:19,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:19,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:19,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:19,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:19,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 214 transitions, 2688 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:19,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:19,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:19,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:19,443 INFO L124 PetriNetUnfolderBase]: 1379/2309 cut-off events. [2024-06-14 14:06:19,444 INFO L125 PetriNetUnfolderBase]: For 74499/74499 co-relation queries the response was YES. [2024-06-14 14:06:19,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13954 conditions, 2309 events. 1379/2309 cut-off events. For 74499/74499 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12963 event pairs, 326 based on Foata normal form. 1/2309 useless extension candidates. Maximal degree in co-relation 13876. Up to 1821 conditions per place. [2024-06-14 14:06:19,462 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 147 changer transitions 0/241 dead transitions. [2024-06-14 14:06:19,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 241 transitions, 3581 flow [2024-06-14 14:06:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:19,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:06:19,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 14:06:19,464 INFO L175 Difference]: Start difference. First operand has 173 places, 214 transitions, 2688 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:06:19,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 241 transitions, 3581 flow [2024-06-14 14:06:19,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 241 transitions, 3470 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:19,577 INFO L231 Difference]: Finished difference. Result has 179 places, 217 transitions, 2924 flow [2024-06-14 14:06:19,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2924, PETRI_PLACES=179, PETRI_TRANSITIONS=217} [2024-06-14 14:06:19,578 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-14 14:06:19,578 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 217 transitions, 2924 flow [2024-06-14 14:06:19,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:19,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:19,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:19,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:06:19,578 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:19,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:19,578 INFO L85 PathProgramCache]: Analyzing trace with hash 572518275, now seen corresponding path program 4 times [2024-06-14 14:06:19,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:19,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499937439] [2024-06-14 14:06:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:19,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:19,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499937439] [2024-06-14 14:06:19,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499937439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:19,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:19,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189277473] [2024-06-14 14:06:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:19,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:19,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:19,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:19,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:19,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:19,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 217 transitions, 2924 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:19,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:19,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,313 INFO L124 PetriNetUnfolderBase]: 1376/2310 cut-off events. [2024-06-14 14:06:20,313 INFO L125 PetriNetUnfolderBase]: For 77890/77890 co-relation queries the response was YES. [2024-06-14 14:06:20,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14219 conditions, 2310 events. 1376/2310 cut-off events. For 77890/77890 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13014 event pairs, 325 based on Foata normal form. 1/2310 useless extension candidates. Maximal degree in co-relation 14139. Up to 1965 conditions per place. [2024-06-14 14:06:20,344 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 155 selfloop transitions, 71 changer transitions 0/232 dead transitions. [2024-06-14 14:06:20,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 232 transitions, 3412 flow [2024-06-14 14:06:20,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:20,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 14:06:20,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 14:06:20,345 INFO L175 Difference]: Start difference. First operand has 179 places, 217 transitions, 2924 flow. Second operand 8 states and 170 transitions. [2024-06-14 14:06:20,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 232 transitions, 3412 flow [2024-06-14 14:06:20,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 232 transitions, 2980 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:20,490 INFO L231 Difference]: Finished difference. Result has 178 places, 217 transitions, 2640 flow [2024-06-14 14:06:20,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2492, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2640, PETRI_PLACES=178, PETRI_TRANSITIONS=217} [2024-06-14 14:06:20,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-14 14:06:20,491 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 217 transitions, 2640 flow [2024-06-14 14:06:20,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:20,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:06:20,491 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:20,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash 966420430, now seen corresponding path program 5 times [2024-06-14 14:06:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442394435] [2024-06-14 14:06:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442394435] [2024-06-14 14:06:20,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442394435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:20,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95070697] [2024-06-14 14:06:20,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:20,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:20,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:20,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 217 transitions, 2640 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:20,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:20,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:20,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:21,135 INFO L124 PetriNetUnfolderBase]: 1381/2319 cut-off events. [2024-06-14 14:06:21,135 INFO L125 PetriNetUnfolderBase]: For 78955/78955 co-relation queries the response was YES. [2024-06-14 14:06:21,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13951 conditions, 2319 events. 1381/2319 cut-off events. For 78955/78955 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13064 event pairs, 298 based on Foata normal form. 1/2320 useless extension candidates. Maximal degree in co-relation 13871. Up to 2091 conditions per place. [2024-06-14 14:06:21,200 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 200 selfloop transitions, 27 changer transitions 0/233 dead transitions. [2024-06-14 14:06:21,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 233 transitions, 3161 flow [2024-06-14 14:06:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:21,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 14:06:21,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-14 14:06:21,201 INFO L175 Difference]: Start difference. First operand has 178 places, 217 transitions, 2640 flow. Second operand 6 states and 133 transitions. [2024-06-14 14:06:21,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 233 transitions, 3161 flow [2024-06-14 14:06:21,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 233 transitions, 2897 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:21,297 INFO L231 Difference]: Finished difference. Result has 175 places, 220 transitions, 2481 flow [2024-06-14 14:06:21,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2481, PETRI_PLACES=175, PETRI_TRANSITIONS=220} [2024-06-14 14:06:21,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 134 predicate places. [2024-06-14 14:06:21,297 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 220 transitions, 2481 flow [2024-06-14 14:06:21,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:21,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:21,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:21,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:06:21,298 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:21,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:21,298 INFO L85 PathProgramCache]: Analyzing trace with hash -114551268, now seen corresponding path program 6 times [2024-06-14 14:06:21,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:21,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193364093] [2024-06-14 14:06:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:21,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:21,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193364093] [2024-06-14 14:06:21,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193364093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:21,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:21,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:21,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431385932] [2024-06-14 14:06:21,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:21,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:21,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:21,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:21,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:21,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:21,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 220 transitions, 2481 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:21,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:21,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:21,930 INFO L124 PetriNetUnfolderBase]: 1378/2312 cut-off events. [2024-06-14 14:06:21,930 INFO L125 PetriNetUnfolderBase]: For 80546/80546 co-relation queries the response was YES. [2024-06-14 14:06:21,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13732 conditions, 2312 events. 1378/2312 cut-off events. For 80546/80546 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 13000 event pairs, 328 based on Foata normal form. 1/2312 useless extension candidates. Maximal degree in co-relation 13652. Up to 1821 conditions per place. [2024-06-14 14:06:21,949 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 85 selfloop transitions, 149 changer transitions 0/240 dead transitions. [2024-06-14 14:06:21,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 240 transitions, 3167 flow [2024-06-14 14:06:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:21,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:21,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 14:06:21,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 14:06:21,950 INFO L175 Difference]: Start difference. First operand has 175 places, 220 transitions, 2481 flow. Second operand 11 states and 230 transitions. [2024-06-14 14:06:21,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 240 transitions, 3167 flow [2024-06-14 14:06:22,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 240 transitions, 3091 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:22,077 INFO L231 Difference]: Finished difference. Result has 181 places, 220 transitions, 2713 flow [2024-06-14 14:06:22,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2713, PETRI_PLACES=181, PETRI_TRANSITIONS=220} [2024-06-14 14:06:22,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 14:06:22,078 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 220 transitions, 2713 flow [2024-06-14 14:06:22,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:22,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:22,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:06:22,078 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:22,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2020817806, now seen corresponding path program 7 times [2024-06-14 14:06:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814654209] [2024-06-14 14:06:22,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:22,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:22,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814654209] [2024-06-14 14:06:22,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814654209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:22,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:22,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:22,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873055373] [2024-06-14 14:06:22,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:22,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:22,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:22,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:22,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:22,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 220 transitions, 2713 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:22,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:22,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:22,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:22,710 INFO L124 PetriNetUnfolderBase]: 1375/2311 cut-off events. [2024-06-14 14:06:22,710 INFO L125 PetriNetUnfolderBase]: For 79707/79707 co-relation queries the response was YES. [2024-06-14 14:06:22,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14023 conditions, 2311 events. 1375/2311 cut-off events. For 79707/79707 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13026 event pairs, 298 based on Foata normal form. 1/2312 useless extension candidates. Maximal degree in co-relation 13943. Up to 1981 conditions per place. [2024-06-14 14:06:22,730 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 186 selfloop transitions, 55 changer transitions 0/247 dead transitions. [2024-06-14 14:06:22,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 247 transitions, 3349 flow [2024-06-14 14:06:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:06:22,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 14:06:22,731 INFO L175 Difference]: Start difference. First operand has 181 places, 220 transitions, 2713 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:06:22,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 247 transitions, 3349 flow [2024-06-14 14:06:22,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 247 transitions, 3014 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:22,852 INFO L231 Difference]: Finished difference. Result has 179 places, 220 transitions, 2502 flow [2024-06-14 14:06:22,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2502, PETRI_PLACES=179, PETRI_TRANSITIONS=220} [2024-06-14 14:06:22,853 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-14 14:06:22,853 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 220 transitions, 2502 flow [2024-06-14 14:06:22,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:22,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:22,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:06:22,853 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)] === [2024-06-14 14:06:22,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2020967536, now seen corresponding path program 8 times [2024-06-14 14:06:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778449194] [2024-06-14 14:06:22,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778449194] [2024-06-14 14:06:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778449194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:23,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087863688] [2024-06-14 14:06:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:23,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:23,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:23,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 220 transitions, 2502 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:23,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,441 INFO L124 PetriNetUnfolderBase]: 1367/2303 cut-off events. [2024-06-14 14:06:23,441 INFO L125 PetriNetUnfolderBase]: For 81536/81536 co-relation queries the response was YES. [2024-06-14 14:06:23,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13574 conditions, 2303 events. 1367/2303 cut-off events. For 81536/81536 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12997 event pairs, 300 based on Foata normal form. 2/2305 useless extension candidates. Maximal degree in co-relation 13495. Up to 1973 conditions per place. [2024-06-14 14:06:23,460 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 184 selfloop transitions, 52 changer transitions 0/242 dead transitions. [2024-06-14 14:06:23,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 242 transitions, 3030 flow [2024-06-14 14:06:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 14:06:23,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-14 14:06:23,461 INFO L175 Difference]: Start difference. First operand has 179 places, 220 transitions, 2502 flow. Second operand 6 states and 147 transitions. [2024-06-14 14:06:23,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 242 transitions, 3030 flow [2024-06-14 14:06:23,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 242 transitions, 2843 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:23,589 INFO L231 Difference]: Finished difference. Result has 178 places, 220 transitions, 2439 flow [2024-06-14 14:06:23,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2439, PETRI_PLACES=178, PETRI_TRANSITIONS=220} [2024-06-14 14:06:23,589 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-14 14:06:23,589 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 220 transitions, 2439 flow [2024-06-14 14:06:23,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:23,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:23,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:23,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:06:23,590 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:23,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1943954596, now seen corresponding path program 9 times [2024-06-14 14:06:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809384957] [2024-06-14 14:06:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809384957] [2024-06-14 14:06:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809384957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473648228] [2024-06-14 14:06:23,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:23,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:23,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:23,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:23,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 220 transitions, 2439 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:23,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:23,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,285 INFO L124 PetriNetUnfolderBase]: 1364/2301 cut-off events. [2024-06-14 14:06:24,285 INFO L125 PetriNetUnfolderBase]: For 79414/79420 co-relation queries the response was YES. [2024-06-14 14:06:24,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13472 conditions, 2301 events. 1364/2301 cut-off events. For 79414/79420 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12987 event pairs, 308 based on Foata normal form. 7/2308 useless extension candidates. Maximal degree in co-relation 13393. Up to 1888 conditions per place. [2024-06-14 14:06:24,304 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 140 selfloop transitions, 99 changer transitions 0/245 dead transitions. [2024-06-14 14:06:24,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 245 transitions, 3067 flow [2024-06-14 14:06:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 14:06:24,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-14 14:06:24,306 INFO L175 Difference]: Start difference. First operand has 178 places, 220 transitions, 2439 flow. Second operand 8 states and 183 transitions. [2024-06-14 14:06:24,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 245 transitions, 3067 flow [2024-06-14 14:06:24,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 245 transitions, 2953 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:24,410 INFO L231 Difference]: Finished difference. Result has 181 places, 220 transitions, 2529 flow [2024-06-14 14:06:24,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2529, PETRI_PLACES=181, PETRI_TRANSITIONS=220} [2024-06-14 14:06:24,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-14 14:06:24,410 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 220 transitions, 2529 flow [2024-06-14 14:06:24,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:24,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:24,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:06:24,411 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:24,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash -2121080536, now seen corresponding path program 10 times [2024-06-14 14:06:24,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943985745] [2024-06-14 14:06:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:24,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943985745] [2024-06-14 14:06:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943985745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:24,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:24,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:24,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182528951] [2024-06-14 14:06:24,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:24,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:24,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:24,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:24,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:24,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:24,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 220 transitions, 2529 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:24,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:24,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:24,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:25,022 INFO L124 PetriNetUnfolderBase]: 1374/2317 cut-off events. [2024-06-14 14:06:25,022 INFO L125 PetriNetUnfolderBase]: For 83761/83761 co-relation queries the response was YES. [2024-06-14 14:06:25,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13777 conditions, 2317 events. 1374/2317 cut-off events. For 83761/83761 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13095 event pairs, 299 based on Foata normal form. 2/2319 useless extension candidates. Maximal degree in co-relation 13697. Up to 1898 conditions per place. [2024-06-14 14:06:25,049 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 153 selfloop transitions, 96 changer transitions 0/255 dead transitions. [2024-06-14 14:06:25,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 255 transitions, 3260 flow [2024-06-14 14:06:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:25,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:06:25,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-14 14:06:25,051 INFO L175 Difference]: Start difference. First operand has 181 places, 220 transitions, 2529 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:06:25,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 255 transitions, 3260 flow [2024-06-14 14:06:25,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 255 transitions, 3113 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:25,221 INFO L231 Difference]: Finished difference. Result has 187 places, 224 transitions, 2659 flow [2024-06-14 14:06:25,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2659, PETRI_PLACES=187, PETRI_TRANSITIONS=224} [2024-06-14 14:06:25,221 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-14 14:06:25,221 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 224 transitions, 2659 flow [2024-06-14 14:06:25,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:25,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:25,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:25,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:06:25,222 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:25,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:25,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2121086116, now seen corresponding path program 11 times [2024-06-14 14:06:25,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:25,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921559156] [2024-06-14 14:06:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:25,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:25,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:25,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921559156] [2024-06-14 14:06:25,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921559156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:25,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:25,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981197548] [2024-06-14 14:06:25,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:25,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:25,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:25,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:25,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 224 transitions, 2659 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:25,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:25,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:25,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:25,862 INFO L124 PetriNetUnfolderBase]: 1366/2305 cut-off events. [2024-06-14 14:06:25,863 INFO L125 PetriNetUnfolderBase]: For 85405/85405 co-relation queries the response was YES. [2024-06-14 14:06:25,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13746 conditions, 2305 events. 1366/2305 cut-off events. For 85405/85405 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13047 event pairs, 299 based on Foata normal form. 2/2307 useless extension candidates. Maximal degree in co-relation 13665. Up to 1890 conditions per place. [2024-06-14 14:06:25,882 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 103 changer transitions 0/256 dead transitions. [2024-06-14 14:06:25,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 256 transitions, 3239 flow [2024-06-14 14:06:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:25,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 14:06:25,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-14 14:06:25,883 INFO L175 Difference]: Start difference. First operand has 187 places, 224 transitions, 2659 flow. Second operand 10 states and 222 transitions. [2024-06-14 14:06:25,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 256 transitions, 3239 flow [2024-06-14 14:06:26,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 256 transitions, 3065 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:26,040 INFO L231 Difference]: Finished difference. Result has 188 places, 224 transitions, 2703 flow [2024-06-14 14:06:26,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2703, PETRI_PLACES=188, PETRI_TRANSITIONS=224} [2024-06-14 14:06:26,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-14 14:06:26,040 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 224 transitions, 2703 flow [2024-06-14 14:06:26,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:26,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:26,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:26,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:06:26,041 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:26,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash -2031684360, now seen corresponding path program 2 times [2024-06-14 14:06:26,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:26,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941844452] [2024-06-14 14:06:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:26,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941844452] [2024-06-14 14:06:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941844452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:26,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:26,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066133602] [2024-06-14 14:06:26,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:26,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:26,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:26,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:26,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:26,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:26,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 224 transitions, 2703 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:26,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:26,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:26,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:26,611 INFO L124 PetriNetUnfolderBase]: 1374/2317 cut-off events. [2024-06-14 14:06:26,612 INFO L125 PetriNetUnfolderBase]: For 85880/85880 co-relation queries the response was YES. [2024-06-14 14:06:26,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13884 conditions, 2317 events. 1374/2317 cut-off events. For 85880/85880 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13114 event pairs, 299 based on Foata normal form. 2/2319 useless extension candidates. Maximal degree in co-relation 13803. Up to 2070 conditions per place. [2024-06-14 14:06:26,629 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 209 selfloop transitions, 30 changer transitions 0/245 dead transitions. [2024-06-14 14:06:26,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 245 transitions, 3267 flow [2024-06-14 14:06:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:26,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 14:06:26,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 14:06:26,631 INFO L175 Difference]: Start difference. First operand has 188 places, 224 transitions, 2703 flow. Second operand 8 states and 166 transitions. [2024-06-14 14:06:26,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 245 transitions, 3267 flow [2024-06-14 14:06:26,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 245 transitions, 2882 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-14 14:06:26,784 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 2430 flow [2024-06-14 14:06:26,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2430, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2024-06-14 14:06:26,784 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-14 14:06:26,784 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 2430 flow [2024-06-14 14:06:26,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:26,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:26,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:26,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:06:26,785 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:26,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:26,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1737085830, now seen corresponding path program 3 times [2024-06-14 14:06:26,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:26,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620617903] [2024-06-14 14:06:26,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:26,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:27,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:27,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620617903] [2024-06-14 14:06:27,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620617903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:27,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:27,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:27,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919848584] [2024-06-14 14:06:27,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:27,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:27,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:27,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:27,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 2430 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:27,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:27,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:27,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:27,364 INFO L124 PetriNetUnfolderBase]: 1382/2329 cut-off events. [2024-06-14 14:06:27,364 INFO L125 PetriNetUnfolderBase]: For 85041/85041 co-relation queries the response was YES. [2024-06-14 14:06:27,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13692 conditions, 2329 events. 1382/2329 cut-off events. For 85041/85041 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13205 event pairs, 302 based on Foata normal form. 2/2331 useless extension candidates. Maximal degree in co-relation 13611. Up to 2094 conditions per place. [2024-06-14 14:06:27,383 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 217 selfloop transitions, 21 changer transitions 0/244 dead transitions. [2024-06-14 14:06:27,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 244 transitions, 2990 flow [2024-06-14 14:06:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:27,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 14:06:27,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-14 14:06:27,384 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 2430 flow. Second operand 5 states and 117 transitions. [2024-06-14 14:06:27,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 244 transitions, 2990 flow [2024-06-14 14:06:27,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 244 transitions, 2894 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:27,535 INFO L231 Difference]: Finished difference. Result has 182 places, 228 transitions, 2429 flow [2024-06-14 14:06:27,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2429, PETRI_PLACES=182, PETRI_TRANSITIONS=228} [2024-06-14 14:06:27,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-14 14:06:27,536 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 228 transitions, 2429 flow [2024-06-14 14:06:27,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:27,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:27,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:27,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:06:27,537 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)] === [2024-06-14 14:06:27,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2020571790, now seen corresponding path program 4 times [2024-06-14 14:06:27,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:27,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124751318] [2024-06-14 14:06:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:27,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:27,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:27,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124751318] [2024-06-14 14:06:27,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124751318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:27,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:27,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:27,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626102695] [2024-06-14 14:06:27,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:27,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:27,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:27,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:27,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:27,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 228 transitions, 2429 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:27,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:27,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:27,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:28,125 INFO L124 PetriNetUnfolderBase]: 1377/2324 cut-off events. [2024-06-14 14:06:28,126 INFO L125 PetriNetUnfolderBase]: For 82464/82464 co-relation queries the response was YES. [2024-06-14 14:06:28,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13467 conditions, 2324 events. 1377/2324 cut-off events. For 82464/82464 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13157 event pairs, 290 based on Foata normal form. 2/2326 useless extension candidates. Maximal degree in co-relation 13385. Up to 2073 conditions per place. [2024-06-14 14:06:28,144 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 217 selfloop transitions, 25 changer transitions 0/248 dead transitions. [2024-06-14 14:06:28,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 248 transitions, 3001 flow [2024-06-14 14:06:28,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 14:06:28,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:06:28,145 INFO L175 Difference]: Start difference. First operand has 182 places, 228 transitions, 2429 flow. Second operand 6 states and 135 transitions. [2024-06-14 14:06:28,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 248 transitions, 3001 flow [2024-06-14 14:06:28,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 248 transitions, 2926 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:28,298 INFO L231 Difference]: Finished difference. Result has 185 places, 230 transitions, 2457 flow [2024-06-14 14:06:28,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2457, PETRI_PLACES=185, PETRI_TRANSITIONS=230} [2024-06-14 14:06:28,298 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-14 14:06:28,298 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 230 transitions, 2457 flow [2024-06-14 14:06:28,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:28,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:28,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:28,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:06:28,299 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)] === [2024-06-14 14:06:28,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:28,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1736634408, now seen corresponding path program 1 times [2024-06-14 14:06:28,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:28,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891141874] [2024-06-14 14:06:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:28,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:28,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891141874] [2024-06-14 14:06:28,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891141874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:28,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:28,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:28,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6903979] [2024-06-14 14:06:28,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:28,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:28,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:28,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:28,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 230 transitions, 2457 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:28,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:28,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:28,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:28,939 INFO L124 PetriNetUnfolderBase]: 1364/2305 cut-off events. [2024-06-14 14:06:28,939 INFO L125 PetriNetUnfolderBase]: For 83563/83563 co-relation queries the response was YES. [2024-06-14 14:06:28,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13186 conditions, 2305 events. 1364/2305 cut-off events. For 83563/83563 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 13053 event pairs, 258 based on Foata normal form. 6/2311 useless extension candidates. Maximal degree in co-relation 13103. Up to 1991 conditions per place. [2024-06-14 14:06:29,002 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 226 selfloop transitions, 22 changer transitions 0/254 dead transitions. [2024-06-14 14:06:29,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 254 transitions, 3037 flow [2024-06-14 14:06:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 14:06:29,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:06:29,003 INFO L175 Difference]: Start difference. First operand has 185 places, 230 transitions, 2457 flow. Second operand 6 states and 140 transitions. [2024-06-14 14:06:29,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 254 transitions, 3037 flow [2024-06-14 14:06:29,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 254 transitions, 2950 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:29,142 INFO L231 Difference]: Finished difference. Result has 187 places, 230 transitions, 2418 flow [2024-06-14 14:06:29,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2418, PETRI_PLACES=187, PETRI_TRANSITIONS=230} [2024-06-14 14:06:29,143 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 146 predicate places. [2024-06-14 14:06:29,143 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 230 transitions, 2418 flow [2024-06-14 14:06:29,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 14:06:29,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:29,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:29,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:06:29,143 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:29,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1073358720, now seen corresponding path program 1 times [2024-06-14 14:06:29,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:29,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573219690] [2024-06-14 14:06:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:29,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:29,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573219690] [2024-06-14 14:06:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573219690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:29,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:29,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:29,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490058708] [2024-06-14 14:06:29,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:29,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:29,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:29,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:29,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:29,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 230 transitions, 2418 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:29,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:29,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:29,885 INFO L124 PetriNetUnfolderBase]: 1612/2740 cut-off events. [2024-06-14 14:06:29,886 INFO L125 PetriNetUnfolderBase]: For 154034/154034 co-relation queries the response was YES. [2024-06-14 14:06:29,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16387 conditions, 2740 events. 1612/2740 cut-off events. For 154034/154034 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16119 event pairs, 330 based on Foata normal form. 30/2769 useless extension candidates. Maximal degree in co-relation 16303. Up to 1307 conditions per place. [2024-06-14 14:06:29,917 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 107 selfloop transitions, 161 changer transitions 7/281 dead transitions. [2024-06-14 14:06:29,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 281 transitions, 3478 flow [2024-06-14 14:06:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-14 14:06:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-14 14:06:29,918 INFO L175 Difference]: Start difference. First operand has 187 places, 230 transitions, 2418 flow. Second operand 11 states and 251 transitions. [2024-06-14 14:06:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 281 transitions, 3478 flow [2024-06-14 14:06:30,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 281 transitions, 3414 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:30,131 INFO L231 Difference]: Finished difference. Result has 193 places, 231 transitions, 2714 flow [2024-06-14 14:06:30,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2714, PETRI_PLACES=193, PETRI_TRANSITIONS=231} [2024-06-14 14:06:30,132 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-14 14:06:30,132 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 231 transitions, 2714 flow [2024-06-14 14:06:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:30,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:30,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:06:30,133 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:30,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:30,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1388164772, now seen corresponding path program 2 times [2024-06-14 14:06:30,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:30,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853029968] [2024-06-14 14:06:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:30,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853029968] [2024-06-14 14:06:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853029968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:30,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:30,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850280687] [2024-06-14 14:06:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:30,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:30,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:30,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:30,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 231 transitions, 2714 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:30,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:30,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:30,986 INFO L124 PetriNetUnfolderBase]: 1823/3087 cut-off events. [2024-06-14 14:06:30,986 INFO L125 PetriNetUnfolderBase]: For 205364/205364 co-relation queries the response was YES. [2024-06-14 14:06:31,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19918 conditions, 3087 events. 1823/3087 cut-off events. For 205364/205364 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18568 event pairs, 524 based on Foata normal form. 30/3116 useless extension candidates. Maximal degree in co-relation 19834. Up to 2105 conditions per place. [2024-06-14 14:06:31,015 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 110 selfloop transitions, 156 changer transitions 4/276 dead transitions. [2024-06-14 14:06:31,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 276 transitions, 3746 flow [2024-06-14 14:06:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-14 14:06:31,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2024-06-14 14:06:31,016 INFO L175 Difference]: Start difference. First operand has 193 places, 231 transitions, 2714 flow. Second operand 12 states and 263 transitions. [2024-06-14 14:06:31,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 276 transitions, 3746 flow [2024-06-14 14:06:31,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 276 transitions, 3506 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:31,306 INFO L231 Difference]: Finished difference. Result has 198 places, 232 transitions, 2844 flow [2024-06-14 14:06:31,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2844, PETRI_PLACES=198, PETRI_TRANSITIONS=232} [2024-06-14 14:06:31,307 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-14 14:06:31,307 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 232 transitions, 2844 flow [2024-06-14 14:06:31,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:31,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:31,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:31,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:06:31,308 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:31,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash -836886690, now seen corresponding path program 3 times [2024-06-14 14:06:31,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:31,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221385921] [2024-06-14 14:06:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:31,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:31,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221385921] [2024-06-14 14:06:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221385921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462581748] [2024-06-14 14:06:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:31,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:31,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 232 transitions, 2844 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:31,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:31,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:32,148 INFO L124 PetriNetUnfolderBase]: 1724/2930 cut-off events. [2024-06-14 14:06:32,148 INFO L125 PetriNetUnfolderBase]: For 169216/169216 co-relation queries the response was YES. [2024-06-14 14:06:32,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17902 conditions, 2930 events. 1724/2930 cut-off events. For 169216/169216 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17483 event pairs, 519 based on Foata normal form. 34/2963 useless extension candidates. Maximal degree in co-relation 17816. Up to 2245 conditions per place. [2024-06-14 14:06:32,184 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 150 changer transitions 5/267 dead transitions. [2024-06-14 14:06:32,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 267 transitions, 3666 flow [2024-06-14 14:06:32,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:06:32,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-14 14:06:32,186 INFO L175 Difference]: Start difference. First operand has 198 places, 232 transitions, 2844 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:06:32,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 267 transitions, 3666 flow [2024-06-14 14:06:32,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 267 transitions, 3422 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:32,483 INFO L231 Difference]: Finished difference. Result has 201 places, 229 transitions, 2862 flow [2024-06-14 14:06:32,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2862, PETRI_PLACES=201, PETRI_TRANSITIONS=229} [2024-06-14 14:06:32,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-14 14:06:32,484 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 229 transitions, 2862 flow [2024-06-14 14:06:32,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:32,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:32,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:06:32,485 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:32,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1387865126, now seen corresponding path program 1 times [2024-06-14 14:06:32,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:32,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876201691] [2024-06-14 14:06:32,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:32,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:32,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:32,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876201691] [2024-06-14 14:06:32,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876201691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:32,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:32,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:32,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698743504] [2024-06-14 14:06:32,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:32,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:32,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:32,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:32,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:32,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 229 transitions, 2862 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:32,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:32,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,099 INFO L124 PetriNetUnfolderBase]: 1452/2448 cut-off events. [2024-06-14 14:06:33,099 INFO L125 PetriNetUnfolderBase]: For 130838/130838 co-relation queries the response was YES. [2024-06-14 14:06:33,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16363 conditions, 2448 events. 1452/2448 cut-off events. For 130838/130838 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14016 event pairs, 373 based on Foata normal form. 1/2448 useless extension candidates. Maximal degree in co-relation 16275. Up to 1973 conditions per place. [2024-06-14 14:06:33,121 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 152 changer transitions 0/263 dead transitions. [2024-06-14 14:06:33,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 263 transitions, 3691 flow [2024-06-14 14:06:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:06:33,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:06:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 268 transitions. [2024-06-14 14:06:33,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153846153846153 [2024-06-14 14:06:33,122 INFO L175 Difference]: Start difference. First operand has 201 places, 229 transitions, 2862 flow. Second operand 13 states and 268 transitions. [2024-06-14 14:06:33,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 263 transitions, 3691 flow [2024-06-14 14:06:33,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 263 transitions, 3362 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:33,302 INFO L231 Difference]: Finished difference. Result has 204 places, 232 transitions, 2884 flow [2024-06-14 14:06:33,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2539, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2884, PETRI_PLACES=204, PETRI_TRANSITIONS=232} [2024-06-14 14:06:33,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-14 14:06:33,302 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 232 transitions, 2884 flow [2024-06-14 14:06:33,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:33,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:33,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:06:33,303 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:33,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:33,303 INFO L85 PathProgramCache]: Analyzing trace with hash -837091104, now seen corresponding path program 2 times [2024-06-14 14:06:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:33,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875495921] [2024-06-14 14:06:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:33,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:33,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875495921] [2024-06-14 14:06:33,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875495921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:33,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668219948] [2024-06-14 14:06:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:33,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:33,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 232 transitions, 2884 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:33,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:33,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,978 INFO L124 PetriNetUnfolderBase]: 1449/2440 cut-off events. [2024-06-14 14:06:33,978 INFO L125 PetriNetUnfolderBase]: For 133983/133983 co-relation queries the response was YES. [2024-06-14 14:06:33,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16296 conditions, 2440 events. 1449/2440 cut-off events. For 133983/133983 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13930 event pairs, 371 based on Foata normal form. 1/2440 useless extension candidates. Maximal degree in co-relation 16207. Up to 1970 conditions per place. [2024-06-14 14:06:34,000 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 104 selfloop transitions, 152 changer transitions 0/262 dead transitions. [2024-06-14 14:06:34,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 262 transitions, 3570 flow [2024-06-14 14:06:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:06:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:06:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-14 14:06:34,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134615384615384 [2024-06-14 14:06:34,002 INFO L175 Difference]: Start difference. First operand has 204 places, 232 transitions, 2884 flow. Second operand 13 states and 267 transitions. [2024-06-14 14:06:34,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 262 transitions, 3570 flow [2024-06-14 14:06:34,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 262 transitions, 3319 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:34,182 INFO L231 Difference]: Finished difference. Result has 208 places, 232 transitions, 2943 flow [2024-06-14 14:06:34,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2943, PETRI_PLACES=208, PETRI_TRANSITIONS=232} [2024-06-14 14:06:34,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-14 14:06:34,182 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 232 transitions, 2943 flow [2024-06-14 14:06:34,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:06:34,183 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:34,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,183 INFO L85 PathProgramCache]: Analyzing trace with hash -781880952, now seen corresponding path program 4 times [2024-06-14 14:06:34,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880242018] [2024-06-14 14:06:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:34,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880242018] [2024-06-14 14:06:34,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880242018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:34,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690949987] [2024-06-14 14:06:34,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:34,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:34,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:34,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:34,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 232 transitions, 2943 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:34,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:34,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:34,983 INFO L124 PetriNetUnfolderBase]: 1553/2619 cut-off events. [2024-06-14 14:06:34,984 INFO L125 PetriNetUnfolderBase]: For 185665/185665 co-relation queries the response was YES. [2024-06-14 14:06:34,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17201 conditions, 2619 events. 1553/2619 cut-off events. For 185665/185665 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15168 event pairs, 410 based on Foata normal form. 34/2653 useless extension candidates. Maximal degree in co-relation 17111. Up to 2175 conditions per place. [2024-06-14 14:06:35,008 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 202 selfloop transitions, 50 changer transitions 3/261 dead transitions. [2024-06-14 14:06:35,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 261 transitions, 3569 flow [2024-06-14 14:06:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:35,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-14 14:06:35,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-14 14:06:35,009 INFO L175 Difference]: Start difference. First operand has 208 places, 232 transitions, 2943 flow. Second operand 12 states and 243 transitions. [2024-06-14 14:06:35,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 261 transitions, 3569 flow [2024-06-14 14:06:35,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 261 transitions, 3265 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 14:06:35,220 INFO L231 Difference]: Finished difference. Result has 208 places, 232 transitions, 2765 flow [2024-06-14 14:06:35,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2639, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2765, PETRI_PLACES=208, PETRI_TRANSITIONS=232} [2024-06-14 14:06:35,221 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-14 14:06:35,221 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 232 transitions, 2765 flow [2024-06-14 14:06:35,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:35,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:35,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:06:35,222 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:35,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:35,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1961044594, now seen corresponding path program 5 times [2024-06-14 14:06:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:35,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514894605] [2024-06-14 14:06:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:35,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:35,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:35,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514894605] [2024-06-14 14:06:35,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514894605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:35,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:35,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:35,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029598463] [2024-06-14 14:06:35,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:35,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:35,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:35,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:35,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:35,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:35,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 232 transitions, 2765 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:35,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:35,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:35,941 INFO L124 PetriNetUnfolderBase]: 1647/2781 cut-off events. [2024-06-14 14:06:35,941 INFO L125 PetriNetUnfolderBase]: For 194129/194129 co-relation queries the response was YES. [2024-06-14 14:06:35,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17801 conditions, 2781 events. 1647/2781 cut-off events. For 194129/194129 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 16456 event pairs, 452 based on Foata normal form. 34/2815 useless extension candidates. Maximal degree in co-relation 17710. Up to 2333 conditions per place. [2024-06-14 14:06:35,967 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 205 selfloop transitions, 45 changer transitions 5/261 dead transitions. [2024-06-14 14:06:35,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 261 transitions, 3393 flow [2024-06-14 14:06:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-14 14:06:35,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-14 14:06:35,968 INFO L175 Difference]: Start difference. First operand has 208 places, 232 transitions, 2765 flow. Second operand 12 states and 243 transitions. [2024-06-14 14:06:35,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 261 transitions, 3393 flow [2024-06-14 14:06:36,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 261 transitions, 3278 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:36,236 INFO L231 Difference]: Finished difference. Result has 210 places, 230 transitions, 2738 flow [2024-06-14 14:06:36,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2738, PETRI_PLACES=210, PETRI_TRANSITIONS=230} [2024-06-14 14:06:36,237 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-14 14:06:36,237 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 230 transitions, 2738 flow [2024-06-14 14:06:36,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:06:36,237 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:36,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1971172294, now seen corresponding path program 6 times [2024-06-14 14:06:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549573846] [2024-06-14 14:06:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:36,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:36,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549573846] [2024-06-14 14:06:36,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549573846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:36,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:36,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:36,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5588405] [2024-06-14 14:06:36,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:36,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:36,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:36,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:36,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:36,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:36,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 230 transitions, 2738 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:36,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:36,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,021 INFO L124 PetriNetUnfolderBase]: 1650/2804 cut-off events. [2024-06-14 14:06:37,021 INFO L125 PetriNetUnfolderBase]: For 194831/194831 co-relation queries the response was YES. [2024-06-14 14:06:37,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17939 conditions, 2804 events. 1650/2804 cut-off events. For 194831/194831 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16661 event pairs, 414 based on Foata normal form. 30/2834 useless extension candidates. Maximal degree in co-relation 17847. Up to 2135 conditions per place. [2024-06-14 14:06:37,057 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 48 changer transitions 7/265 dead transitions. [2024-06-14 14:06:37,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 265 transitions, 3410 flow [2024-06-14 14:06:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:37,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 14:06:37,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-14 14:06:37,058 INFO L175 Difference]: Start difference. First operand has 210 places, 230 transitions, 2738 flow. Second operand 12 states and 247 transitions. [2024-06-14 14:06:37,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 265 transitions, 3410 flow [2024-06-14 14:06:37,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 265 transitions, 3303 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:37,327 INFO L231 Difference]: Finished difference. Result has 212 places, 229 transitions, 2740 flow [2024-06-14 14:06:37,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2631, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2740, PETRI_PLACES=212, PETRI_TRANSITIONS=229} [2024-06-14 14:06:37,328 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-14 14:06:37,328 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 229 transitions, 2740 flow [2024-06-14 14:06:37,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:37,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:37,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:06:37,328 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:37,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1700161178, now seen corresponding path program 1 times [2024-06-14 14:06:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:37,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205306914] [2024-06-14 14:06:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:37,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:37,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205306914] [2024-06-14 14:06:37,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205306914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:37,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:37,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:37,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331456441] [2024-06-14 14:06:37,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:37,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:37,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:37,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:37,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:37,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:37,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 229 transitions, 2740 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:37,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:37,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,946 INFO L124 PetriNetUnfolderBase]: 1571/2627 cut-off events. [2024-06-14 14:06:37,946 INFO L125 PetriNetUnfolderBase]: For 185718/185718 co-relation queries the response was YES. [2024-06-14 14:06:37,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17957 conditions, 2627 events. 1571/2627 cut-off events. For 185718/185718 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15271 event pairs, 386 based on Foata normal form. 10/2632 useless extension candidates. Maximal degree in co-relation 17864. Up to 2068 conditions per place. [2024-06-14 14:06:37,970 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 192 selfloop transitions, 67 changer transitions 0/265 dead transitions. [2024-06-14 14:06:37,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 265 transitions, 3528 flow [2024-06-14 14:06:37,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:37,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:06:37,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:06:37,971 INFO L175 Difference]: Start difference. First operand has 212 places, 229 transitions, 2740 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:06:37,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 265 transitions, 3528 flow [2024-06-14 14:06:38,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 265 transitions, 3404 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:38,348 INFO L231 Difference]: Finished difference. Result has 209 places, 233 transitions, 2815 flow [2024-06-14 14:06:38,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2815, PETRI_PLACES=209, PETRI_TRANSITIONS=233} [2024-06-14 14:06:38,348 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-14 14:06:38,348 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 233 transitions, 2815 flow [2024-06-14 14:06:38,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:38,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:38,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:06:38,349 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)] === [2024-06-14 14:06:38,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:38,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2043885156, now seen corresponding path program 2 times [2024-06-14 14:06:38,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:38,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730305641] [2024-06-14 14:06:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:38,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:38,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:38,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730305641] [2024-06-14 14:06:38,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730305641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:38,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:38,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:38,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754563475] [2024-06-14 14:06:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:38,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:38,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:38,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:38,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 233 transitions, 2815 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:38,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:38,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:39,038 INFO L124 PetriNetUnfolderBase]: 1607/2688 cut-off events. [2024-06-14 14:06:39,038 INFO L125 PetriNetUnfolderBase]: For 191595/191595 co-relation queries the response was YES. [2024-06-14 14:06:39,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18354 conditions, 2688 events. 1607/2688 cut-off events. For 191595/191595 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 15616 event pairs, 415 based on Foata normal form. 10/2697 useless extension candidates. Maximal degree in co-relation 18260. Up to 2323 conditions per place. [2024-06-14 14:06:39,063 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 64 changer transitions 0/259 dead transitions. [2024-06-14 14:06:39,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 259 transitions, 3425 flow [2024-06-14 14:06:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:06:39,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:06:39,063 INFO L175 Difference]: Start difference. First operand has 209 places, 233 transitions, 2815 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:06:39,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 259 transitions, 3425 flow [2024-06-14 14:06:39,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 259 transitions, 3270 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:39,323 INFO L231 Difference]: Finished difference. Result has 212 places, 235 transitions, 2830 flow [2024-06-14 14:06:39,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2668, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2830, PETRI_PLACES=212, PETRI_TRANSITIONS=235} [2024-06-14 14:06:39,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-14 14:06:39,324 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 235 transitions, 2830 flow [2024-06-14 14:06:39,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:39,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:39,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:06:39,324 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)] === [2024-06-14 14:06:39,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1351528000, now seen corresponding path program 3 times [2024-06-14 14:06:39,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:39,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853272297] [2024-06-14 14:06:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:39,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:39,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:39,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853272297] [2024-06-14 14:06:39,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853272297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:39,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:39,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:39,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637775332] [2024-06-14 14:06:39,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:39,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:39,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:39,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:39,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 235 transitions, 2830 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:39,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:39,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:40,129 INFO L124 PetriNetUnfolderBase]: 1620/2714 cut-off events. [2024-06-14 14:06:40,129 INFO L125 PetriNetUnfolderBase]: For 184072/184072 co-relation queries the response was YES. [2024-06-14 14:06:40,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18579 conditions, 2714 events. 1620/2714 cut-off events. For 184072/184072 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15840 event pairs, 391 based on Foata normal form. 1/2714 useless extension candidates. Maximal degree in co-relation 18484. Up to 2246 conditions per place. [2024-06-14 14:06:40,160 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 119 selfloop transitions, 144 changer transitions 0/269 dead transitions. [2024-06-14 14:06:40,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 269 transitions, 3702 flow [2024-06-14 14:06:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:06:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:06:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-14 14:06:40,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134615384615384 [2024-06-14 14:06:40,162 INFO L175 Difference]: Start difference. First operand has 212 places, 235 transitions, 2830 flow. Second operand 13 states and 267 transitions. [2024-06-14 14:06:40,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 269 transitions, 3702 flow [2024-06-14 14:06:40,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 269 transitions, 3564 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:40,443 INFO L231 Difference]: Finished difference. Result has 220 places, 241 transitions, 3038 flow [2024-06-14 14:06:40,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2692, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3038, PETRI_PLACES=220, PETRI_TRANSITIONS=241} [2024-06-14 14:06:40,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-14 14:06:40,443 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 241 transitions, 3038 flow [2024-06-14 14:06:40,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:40,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:40,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:06:40,444 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)] === [2024-06-14 14:06:40,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2046686254, now seen corresponding path program 4 times [2024-06-14 14:06:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:40,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525094755] [2024-06-14 14:06:40,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:40,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:40,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:40,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525094755] [2024-06-14 14:06:40,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525094755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:40,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:40,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:40,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035354137] [2024-06-14 14:06:40,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:40,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:40,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:40,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:40,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:40,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:40,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 241 transitions, 3038 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:40,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:40,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:41,126 INFO L124 PetriNetUnfolderBase]: 1617/2706 cut-off events. [2024-06-14 14:06:41,127 INFO L125 PetriNetUnfolderBase]: For 188725/188725 co-relation queries the response was YES. [2024-06-14 14:06:41,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18764 conditions, 2706 events. 1617/2706 cut-off events. For 188725/188725 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15750 event pairs, 412 based on Foata normal form. 1/2706 useless extension candidates. Maximal degree in co-relation 18668. Up to 2243 conditions per place. [2024-06-14 14:06:41,157 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 144 changer transitions 0/268 dead transitions. [2024-06-14 14:06:41,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 268 transitions, 3742 flow [2024-06-14 14:06:41,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:06:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:06:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-06-14 14:06:41,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115384615384615 [2024-06-14 14:06:41,158 INFO L175 Difference]: Start difference. First operand has 220 places, 241 transitions, 3038 flow. Second operand 13 states and 266 transitions. [2024-06-14 14:06:41,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 268 transitions, 3742 flow [2024-06-14 14:06:41,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 268 transitions, 3502 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:41,455 INFO L231 Difference]: Finished difference. Result has 224 places, 241 transitions, 3092 flow [2024-06-14 14:06:41,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2798, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3092, PETRI_PLACES=224, PETRI_TRANSITIONS=241} [2024-06-14 14:06:41,456 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-14 14:06:41,456 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 241 transitions, 3092 flow [2024-06-14 14:06:41,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:41,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:41,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:41,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:06:41,457 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)] === [2024-06-14 14:06:41,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:41,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1466824812, now seen corresponding path program 3 times [2024-06-14 14:06:41,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:41,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986536365] [2024-06-14 14:06:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:41,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:41,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:41,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986536365] [2024-06-14 14:06:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986536365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754164859] [2024-06-14 14:06:41,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:41,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:41,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:41,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:41,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:41,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 241 transitions, 3092 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:41,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:41,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:41,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:42,158 INFO L124 PetriNetUnfolderBase]: 1653/2769 cut-off events. [2024-06-14 14:06:42,158 INFO L125 PetriNetUnfolderBase]: For 210806/210806 co-relation queries the response was YES. [2024-06-14 14:06:42,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19139 conditions, 2769 events. 1653/2769 cut-off events. For 210806/210806 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16201 event pairs, 412 based on Foata normal form. 10/2779 useless extension candidates. Maximal degree in co-relation 19042. Up to 2494 conditions per place. [2024-06-14 14:06:42,183 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 236 selfloop transitions, 23 changer transitions 0/265 dead transitions. [2024-06-14 14:06:42,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 265 transitions, 3704 flow [2024-06-14 14:06:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 14:06:42,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528125 [2024-06-14 14:06:42,184 INFO L175 Difference]: Start difference. First operand has 224 places, 241 transitions, 3092 flow. Second operand 8 states and 169 transitions. [2024-06-14 14:06:42,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 265 transitions, 3704 flow [2024-06-14 14:06:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 265 transitions, 3416 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 14:06:42,527 INFO L231 Difference]: Finished difference. Result has 220 places, 243 transitions, 2888 flow [2024-06-14 14:06:42,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2804, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2888, PETRI_PLACES=220, PETRI_TRANSITIONS=243} [2024-06-14 14:06:42,528 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-14 14:06:42,528 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 243 transitions, 2888 flow [2024-06-14 14:06:42,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:42,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:42,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:42,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:06:42,528 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)] === [2024-06-14 14:06:42,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:42,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1409694220, now seen corresponding path program 1 times [2024-06-14 14:06:42,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:42,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204457453] [2024-06-14 14:06:42,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:42,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:42,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:42,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204457453] [2024-06-14 14:06:42,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204457453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:42,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:42,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:42,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920496614] [2024-06-14 14:06:42,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:42,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:42,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:42,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:42,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:42,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:42,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 243 transitions, 2888 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:42,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:42,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:42,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:43,385 INFO L124 PetriNetUnfolderBase]: 1936/3266 cut-off events. [2024-06-14 14:06:43,385 INFO L125 PetriNetUnfolderBase]: For 314839/314839 co-relation queries the response was YES. [2024-06-14 14:06:43,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22950 conditions, 3266 events. 1936/3266 cut-off events. For 314839/314839 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19976 event pairs, 501 based on Foata normal form. 30/3296 useless extension candidates. Maximal degree in co-relation 22852. Up to 2370 conditions per place. [2024-06-14 14:06:43,415 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 229 selfloop transitions, 45 changer transitions 0/280 dead transitions. [2024-06-14 14:06:43,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 280 transitions, 3728 flow [2024-06-14 14:06:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:43,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-14 14:06:43,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-14 14:06:43,416 INFO L175 Difference]: Start difference. First operand has 220 places, 243 transitions, 2888 flow. Second operand 12 states and 246 transitions. [2024-06-14 14:06:43,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 280 transitions, 3728 flow [2024-06-14 14:06:43,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 280 transitions, 3668 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:43,789 INFO L231 Difference]: Finished difference. Result has 227 places, 245 transitions, 2991 flow [2024-06-14 14:06:43,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2991, PETRI_PLACES=227, PETRI_TRANSITIONS=245} [2024-06-14 14:06:43,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-14 14:06:43,790 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 245 transitions, 2991 flow [2024-06-14 14:06:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:43,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:43,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:06:43,790 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)] === [2024-06-14 14:06:43,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:43,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1441926450, now seen corresponding path program 7 times [2024-06-14 14:06:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:43,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509427551] [2024-06-14 14:06:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:44,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509427551] [2024-06-14 14:06:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509427551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:44,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:44,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:44,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875280493] [2024-06-14 14:06:44,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:44,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:44,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:44,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:44,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:44,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 245 transitions, 2991 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:44,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:44,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:44,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:44,571 INFO L124 PetriNetUnfolderBase]: 2040/3438 cut-off events. [2024-06-14 14:06:44,571 INFO L125 PetriNetUnfolderBase]: For 339300/339300 co-relation queries the response was YES. [2024-06-14 14:06:44,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24017 conditions, 3438 events. 2040/3438 cut-off events. For 339300/339300 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 21384 event pairs, 619 based on Foata normal form. 34/3472 useless extension candidates. Maximal degree in co-relation 23917. Up to 2817 conditions per place. [2024-06-14 14:06:44,604 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 182 selfloop transitions, 89 changer transitions 6/283 dead transitions. [2024-06-14 14:06:44,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 283 transitions, 3691 flow [2024-06-14 14:06:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-14 14:06:44,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:06:44,605 INFO L175 Difference]: Start difference. First operand has 227 places, 245 transitions, 2991 flow. Second operand 12 states and 256 transitions. [2024-06-14 14:06:44,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 283 transitions, 3691 flow [2024-06-14 14:06:45,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 283 transitions, 3596 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:45,056 INFO L231 Difference]: Finished difference. Result has 230 places, 242 transitions, 3067 flow [2024-06-14 14:06:45,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2896, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3067, PETRI_PLACES=230, PETRI_TRANSITIONS=242} [2024-06-14 14:06:45,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-14 14:06:45,057 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 242 transitions, 3067 flow [2024-06-14 14:06:45,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:45,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:45,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:06:45,058 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)] === [2024-06-14 14:06:45,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1774394010, now seen corresponding path program 8 times [2024-06-14 14:06:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:45,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425467834] [2024-06-14 14:06:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:45,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:45,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:45,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425467834] [2024-06-14 14:06:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425467834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:45,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:45,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:45,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497995368] [2024-06-14 14:06:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:45,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:45,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:45,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 242 transitions, 3067 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:45,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:45,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:45,943 INFO L124 PetriNetUnfolderBase]: 2057/3469 cut-off events. [2024-06-14 14:06:45,943 INFO L125 PetriNetUnfolderBase]: For 351730/351730 co-relation queries the response was YES. [2024-06-14 14:06:45,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24573 conditions, 3469 events. 2057/3469 cut-off events. For 351730/351730 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21555 event pairs, 561 based on Foata normal form. 34/3503 useless extension candidates. Maximal degree in co-relation 24472. Up to 2883 conditions per place. [2024-06-14 14:06:45,974 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 54 changer transitions 3/278 dead transitions. [2024-06-14 14:06:45,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 278 transitions, 3757 flow [2024-06-14 14:06:45,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:45,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:45,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:06:45,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-14 14:06:45,975 INFO L175 Difference]: Start difference. First operand has 230 places, 242 transitions, 3067 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:06:45,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 278 transitions, 3757 flow [2024-06-14 14:06:46,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 278 transitions, 3557 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:46,448 INFO L231 Difference]: Finished difference. Result has 227 places, 240 transitions, 2993 flow [2024-06-14 14:06:46,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2993, PETRI_PLACES=227, PETRI_TRANSITIONS=240} [2024-06-14 14:06:46,449 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-14 14:06:46,449 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 240 transitions, 2993 flow [2024-06-14 14:06:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:46,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:46,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:46,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:06:46,450 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)] === [2024-06-14 14:06:46,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:46,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1332683910, now seen corresponding path program 9 times [2024-06-14 14:06:46,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:46,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011118831] [2024-06-14 14:06:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:46,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:46,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011118831] [2024-06-14 14:06:46,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011118831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:46,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:46,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:46,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939573522] [2024-06-14 14:06:46,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:46,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:46,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:46,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:46,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:46,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 240 transitions, 2993 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:46,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:46,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:46,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:47,216 INFO L124 PetriNetUnfolderBase]: 2063/3483 cut-off events. [2024-06-14 14:06:47,216 INFO L125 PetriNetUnfolderBase]: For 346943/346943 co-relation queries the response was YES. [2024-06-14 14:06:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24408 conditions, 3483 events. 2063/3483 cut-off events. For 346943/346943 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21749 event pairs, 628 based on Foata normal form. 34/3517 useless extension candidates. Maximal degree in co-relation 24306. Up to 2874 conditions per place. [2024-06-14 14:06:47,251 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 179 selfloop transitions, 92 changer transitions 3/280 dead transitions. [2024-06-14 14:06:47,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 280 transitions, 3695 flow [2024-06-14 14:06:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 14:06:47,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:06:47,252 INFO L175 Difference]: Start difference. First operand has 227 places, 240 transitions, 2993 flow. Second operand 11 states and 242 transitions. [2024-06-14 14:06:47,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 280 transitions, 3695 flow [2024-06-14 14:06:47,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 280 transitions, 3570 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:47,845 INFO L231 Difference]: Finished difference. Result has 232 places, 240 transitions, 3088 flow [2024-06-14 14:06:47,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2868, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3088, PETRI_PLACES=232, PETRI_TRANSITIONS=240} [2024-06-14 14:06:47,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-14 14:06:47,846 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 240 transitions, 3088 flow [2024-06-14 14:06:47,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:47,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:47,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:47,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:06:47,846 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)] === [2024-06-14 14:06:47,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:47,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1431798750, now seen corresponding path program 10 times [2024-06-14 14:06:47,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:47,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280739570] [2024-06-14 14:06:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:47,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:48,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:48,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280739570] [2024-06-14 14:06:48,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280739570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:48,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:48,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651058021] [2024-06-14 14:06:48,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:48,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:48,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 240 transitions, 3088 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:48,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:48,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:48,813 INFO L124 PetriNetUnfolderBase]: 2108/3586 cut-off events. [2024-06-14 14:06:48,813 INFO L125 PetriNetUnfolderBase]: For 334946/334946 co-relation queries the response was YES. [2024-06-14 14:06:48,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24296 conditions, 3586 events. 2108/3586 cut-off events. For 334946/334946 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22604 event pairs, 527 based on Foata normal form. 30/3616 useless extension candidates. Maximal degree in co-relation 24194. Up to 2621 conditions per place. [2024-06-14 14:06:48,848 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 176 selfloop transitions, 98 changer transitions 8/288 dead transitions. [2024-06-14 14:06:48,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 288 transitions, 3810 flow [2024-06-14 14:06:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:48,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:48,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-14 14:06:48,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:06:48,849 INFO L175 Difference]: Start difference. First operand has 232 places, 240 transitions, 3088 flow. Second operand 11 states and 250 transitions. [2024-06-14 14:06:48,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 288 transitions, 3810 flow [2024-06-14 14:06:49,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 288 transitions, 3604 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:49,389 INFO L231 Difference]: Finished difference. Result has 234 places, 237 transitions, 3041 flow [2024-06-14 14:06:49,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2882, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3041, PETRI_PLACES=234, PETRI_TRANSITIONS=237} [2024-06-14 14:06:49,389 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-14 14:06:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 237 transitions, 3041 flow [2024-06-14 14:06:49,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:49,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:49,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:06:49,390 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:49,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash -860315320, now seen corresponding path program 4 times [2024-06-14 14:06:49,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:49,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100619489] [2024-06-14 14:06:49,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:49,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:49,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:49,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100619489] [2024-06-14 14:06:49,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100619489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:49,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:49,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:49,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660655646] [2024-06-14 14:06:49,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:49,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:49,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:49,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:49,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:49,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:49,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 237 transitions, 3041 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:49,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:49,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:50,050 INFO L124 PetriNetUnfolderBase]: 1953/3297 cut-off events. [2024-06-14 14:06:50,050 INFO L125 PetriNetUnfolderBase]: For 283220/283220 co-relation queries the response was YES. [2024-06-14 14:06:50,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23431 conditions, 3297 events. 1953/3297 cut-off events. For 283220/283220 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20356 event pairs, 604 based on Foata normal form. 2/3298 useless extension candidates. Maximal degree in co-relation 23328. Up to 2905 conditions per place. [2024-06-14 14:06:50,082 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 191 selfloop transitions, 67 changer transitions 0/264 dead transitions. [2024-06-14 14:06:50,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 264 transitions, 3803 flow [2024-06-14 14:06:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 14:06:50,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:06:50,084 INFO L175 Difference]: Start difference. First operand has 234 places, 237 transitions, 3041 flow. Second operand 7 states and 160 transitions. [2024-06-14 14:06:50,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 264 transitions, 3803 flow [2024-06-14 14:06:50,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 264 transitions, 3439 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-14 14:06:50,673 INFO L231 Difference]: Finished difference. Result has 230 places, 241 transitions, 2886 flow [2024-06-14 14:06:50,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2679, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2886, PETRI_PLACES=230, PETRI_TRANSITIONS=241} [2024-06-14 14:06:50,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-14 14:06:50,673 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 241 transitions, 2886 flow [2024-06-14 14:06:50,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:50,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:50,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:50,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:06:50,673 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:50,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:50,674 INFO L85 PathProgramCache]: Analyzing trace with hash 456987202, now seen corresponding path program 5 times [2024-06-14 14:06:50,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:50,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974290872] [2024-06-14 14:06:50,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:50,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:50,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:50,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974290872] [2024-06-14 14:06:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974290872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:50,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:50,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:50,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969184910] [2024-06-14 14:06:50,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:50,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:50,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:50,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:50,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 241 transitions, 2886 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:50,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:50,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:50,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:51,326 INFO L124 PetriNetUnfolderBase]: 1961/3305 cut-off events. [2024-06-14 14:06:51,326 INFO L125 PetriNetUnfolderBase]: For 280796/280796 co-relation queries the response was YES. [2024-06-14 14:06:51,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22928 conditions, 3305 events. 1961/3305 cut-off events. For 280796/280796 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20419 event pairs, 604 based on Foata normal form. 2/3306 useless extension candidates. Maximal degree in co-relation 22825. Up to 2950 conditions per place. [2024-06-14 14:06:51,357 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 191 selfloop transitions, 64 changer transitions 0/261 dead transitions. [2024-06-14 14:06:51,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 261 transitions, 3476 flow [2024-06-14 14:06:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 14:06:51,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 14:06:51,358 INFO L175 Difference]: Start difference. First operand has 230 places, 241 transitions, 2886 flow. Second operand 7 states and 155 transitions. [2024-06-14 14:06:51,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 261 transitions, 3476 flow [2024-06-14 14:06:51,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 261 transitions, 3344 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:51,782 INFO L231 Difference]: Finished difference. Result has 234 places, 243 transitions, 2927 flow [2024-06-14 14:06:51,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2927, PETRI_PLACES=234, PETRI_TRANSITIONS=243} [2024-06-14 14:06:51,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-14 14:06:51,783 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 243 transitions, 2927 flow [2024-06-14 14:06:51,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:51,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:51,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:51,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:06:51,783 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:51,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -814368190, now seen corresponding path program 6 times [2024-06-14 14:06:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:51,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66587105] [2024-06-14 14:06:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:51,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:51,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66587105] [2024-06-14 14:06:51,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66587105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:51,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:51,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198246875] [2024-06-14 14:06:51,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:51,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:51,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:52,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:52,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 243 transitions, 2927 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:52,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:52,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:52,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:52,498 INFO L124 PetriNetUnfolderBase]: 1969/3323 cut-off events. [2024-06-14 14:06:52,499 INFO L125 PetriNetUnfolderBase]: For 288814/288814 co-relation queries the response was YES. [2024-06-14 14:06:52,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23184 conditions, 3323 events. 1969/3323 cut-off events. For 288814/288814 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20560 event pairs, 533 based on Foata normal form. 2/3324 useless extension candidates. Maximal degree in co-relation 23079. Up to 2536 conditions per place. [2024-06-14 14:06:52,527 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 188 selfloop transitions, 85 changer transitions 0/279 dead transitions. [2024-06-14 14:06:52,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 279 transitions, 3917 flow [2024-06-14 14:06:52,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:52,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:52,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:06:52,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:06:52,530 INFO L175 Difference]: Start difference. First operand has 234 places, 243 transitions, 2927 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:06:52,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 279 transitions, 3917 flow [2024-06-14 14:06:53,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 279 transitions, 3778 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:53,021 INFO L231 Difference]: Finished difference. Result has 237 places, 251 transitions, 3119 flow [2024-06-14 14:06:53,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2788, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3119, PETRI_PLACES=237, PETRI_TRANSITIONS=251} [2024-06-14 14:06:53,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-14 14:06:53,022 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 251 transitions, 3119 flow [2024-06-14 14:06:53,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:53,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:53,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:06:53,022 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)] === [2024-06-14 14:06:53,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1653854360, now seen corresponding path program 7 times [2024-06-14 14:06:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034739197] [2024-06-14 14:06:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:53,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:53,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034739197] [2024-06-14 14:06:53,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034739197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:53,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517639036] [2024-06-14 14:06:53,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:53,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:53,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:53,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:53,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 251 transitions, 3119 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:53,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:53,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:53,721 INFO L124 PetriNetUnfolderBase]: 1977/3335 cut-off events. [2024-06-14 14:06:53,721 INFO L125 PetriNetUnfolderBase]: For 298691/298691 co-relation queries the response was YES. [2024-06-14 14:06:53,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23882 conditions, 3335 events. 1977/3335 cut-off events. For 298691/298691 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 20627 event pairs, 519 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 23775. Up to 2544 conditions per place. [2024-06-14 14:06:53,754 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 187 selfloop transitions, 88 changer transitions 0/281 dead transitions. [2024-06-14 14:06:53,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 281 transitions, 3942 flow [2024-06-14 14:06:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 14:06:53,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 14:06:53,755 INFO L175 Difference]: Start difference. First operand has 237 places, 251 transitions, 3119 flow. Second operand 7 states and 164 transitions. [2024-06-14 14:06:53,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 281 transitions, 3942 flow [2024-06-14 14:06:54,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 281 transitions, 3790 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:54,362 INFO L231 Difference]: Finished difference. Result has 242 places, 254 transitions, 3201 flow [2024-06-14 14:06:54,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2987, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3201, PETRI_PLACES=242, PETRI_TRANSITIONS=254} [2024-06-14 14:06:54,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-14 14:06:54,363 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 254 transitions, 3201 flow [2024-06-14 14:06:54,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:54,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:54,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:54,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:06:54,363 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:54,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash 456991790, now seen corresponding path program 5 times [2024-06-14 14:06:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749110272] [2024-06-14 14:06:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:54,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:54,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749110272] [2024-06-14 14:06:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749110272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:54,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:54,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:54,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210279332] [2024-06-14 14:06:54,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:54,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:54,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:54,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 254 transitions, 3201 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:54,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:54,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:54,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:55,190 INFO L124 PetriNetUnfolderBase]: 1990/3352 cut-off events. [2024-06-14 14:06:55,191 INFO L125 PetriNetUnfolderBase]: For 306746/306746 co-relation queries the response was YES. [2024-06-14 14:06:55,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24248 conditions, 3352 events. 1990/3352 cut-off events. For 306746/306746 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20719 event pairs, 607 based on Foata normal form. 1/3352 useless extension candidates. Maximal degree in co-relation 24139. Up to 2878 conditions per place. [2024-06-14 14:06:55,223 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 132 selfloop transitions, 147 changer transitions 0/285 dead transitions. [2024-06-14 14:06:55,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 285 transitions, 4127 flow [2024-06-14 14:06:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:06:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:06:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 264 transitions. [2024-06-14 14:06:55,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-14 14:06:55,224 INFO L175 Difference]: Start difference. First operand has 242 places, 254 transitions, 3201 flow. Second operand 13 states and 264 transitions. [2024-06-14 14:06:55,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 285 transitions, 4127 flow [2024-06-14 14:06:55,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 285 transitions, 3987 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:55,703 INFO L231 Difference]: Finished difference. Result has 252 places, 260 transitions, 3407 flow [2024-06-14 14:06:55,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3061, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3407, PETRI_PLACES=252, PETRI_TRANSITIONS=260} [2024-06-14 14:06:55,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-14 14:06:55,704 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 260 transitions, 3407 flow [2024-06-14 14:06:55,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:55,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:55,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:55,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:06:55,704 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:55,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:55,705 INFO L85 PathProgramCache]: Analyzing trace with hash 456981560, now seen corresponding path program 6 times [2024-06-14 14:06:55,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:55,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540835153] [2024-06-14 14:06:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:55,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:55,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:55,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540835153] [2024-06-14 14:06:55,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540835153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:55,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:55,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:55,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673741096] [2024-06-14 14:06:55,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:55,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:55,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:55,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:55,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:56,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:56,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 260 transitions, 3407 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:56,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:56,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:56,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:56,535 INFO L124 PetriNetUnfolderBase]: 1987/3364 cut-off events. [2024-06-14 14:06:56,535 INFO L125 PetriNetUnfolderBase]: For 312966/312966 co-relation queries the response was YES. [2024-06-14 14:06:56,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24348 conditions, 3364 events. 1987/3364 cut-off events. For 312966/312966 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20896 event pairs, 619 based on Foata normal form. 1/3364 useless extension candidates. Maximal degree in co-relation 24238. Up to 2875 conditions per place. [2024-06-14 14:06:56,569 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 147 changer transitions 0/284 dead transitions. [2024-06-14 14:06:56,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 284 transitions, 4153 flow [2024-06-14 14:06:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:06:56,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:06:56,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-14 14:06:56,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057692307692307 [2024-06-14 14:06:56,570 INFO L175 Difference]: Start difference. First operand has 252 places, 260 transitions, 3407 flow. Second operand 13 states and 263 transitions. [2024-06-14 14:06:56,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 284 transitions, 4153 flow [2024-06-14 14:06:57,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 284 transitions, 3897 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:57,147 INFO L231 Difference]: Finished difference. Result has 256 places, 260 transitions, 3451 flow [2024-06-14 14:06:57,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3151, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3451, PETRI_PLACES=256, PETRI_TRANSITIONS=260} [2024-06-14 14:06:57,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-14 14:06:57,148 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 260 transitions, 3451 flow [2024-06-14 14:06:57,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:57,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:57,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:06:57,149 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)] === [2024-06-14 14:06:57,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:57,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1934027330, now seen corresponding path program 8 times [2024-06-14 14:06:57,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:57,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690067315] [2024-06-14 14:06:57,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:57,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:57,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690067315] [2024-06-14 14:06:57,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690067315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:57,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:57,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:57,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862635731] [2024-06-14 14:06:57,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:57,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:57,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:57,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:57,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 260 transitions, 3451 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:57,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:57,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:57,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:57,842 INFO L124 PetriNetUnfolderBase]: 1995/3375 cut-off events. [2024-06-14 14:06:57,842 INFO L125 PetriNetUnfolderBase]: For 324467/324467 co-relation queries the response was YES. [2024-06-14 14:06:57,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24579 conditions, 3375 events. 1995/3375 cut-off events. For 324467/324467 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20961 event pairs, 622 based on Foata normal form. 2/3376 useless extension candidates. Maximal degree in co-relation 24468. Up to 3000 conditions per place. [2024-06-14 14:06:57,877 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 64 changer transitions 0/277 dead transitions. [2024-06-14 14:06:57,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 277 transitions, 4063 flow [2024-06-14 14:06:57,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:57,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 14:06:57,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:06:57,878 INFO L175 Difference]: Start difference. First operand has 256 places, 260 transitions, 3451 flow. Second operand 7 states and 152 transitions. [2024-06-14 14:06:57,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 277 transitions, 4063 flow [2024-06-14 14:06:58,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 277 transitions, 3769 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 14:06:58,467 INFO L231 Difference]: Finished difference. Result has 251 places, 262 transitions, 3328 flow [2024-06-14 14:06:58,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3328, PETRI_PLACES=251, PETRI_TRANSITIONS=262} [2024-06-14 14:06:58,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-14 14:06:58,467 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 262 transitions, 3328 flow [2024-06-14 14:06:58,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:58,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:58,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:58,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:06:58,468 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)] === [2024-06-14 14:06:58,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1941645890, now seen corresponding path program 9 times [2024-06-14 14:06:58,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:58,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307417833] [2024-06-14 14:06:58,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:58,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:58,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:58,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:58,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307417833] [2024-06-14 14:06:58,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307417833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:58,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:58,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:58,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948935723] [2024-06-14 14:06:58,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:58,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:58,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:58,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:58,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:58,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:06:58,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 262 transitions, 3328 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:58,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:58,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:06:58,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:59,187 INFO L124 PetriNetUnfolderBase]: 2003/3371 cut-off events. [2024-06-14 14:06:59,187 INFO L125 PetriNetUnfolderBase]: For 334014/334014 co-relation queries the response was YES. [2024-06-14 14:06:59,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24585 conditions, 3371 events. 2003/3371 cut-off events. For 334014/334014 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20825 event pairs, 608 based on Foata normal form. 2/3372 useless extension candidates. Maximal degree in co-relation 24473. Up to 2954 conditions per place. [2024-06-14 14:06:59,220 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 71 changer transitions 0/284 dead transitions. [2024-06-14 14:06:59,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 284 transitions, 3978 flow [2024-06-14 14:06:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:59,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 14:06:59,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 14:06:59,221 INFO L175 Difference]: Start difference. First operand has 251 places, 262 transitions, 3328 flow. Second operand 7 states and 156 transitions. [2024-06-14 14:06:59,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 284 transitions, 3978 flow [2024-06-14 14:06:59,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 284 transitions, 3835 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:59,885 INFO L231 Difference]: Finished difference. Result has 254 places, 265 transitions, 3387 flow [2024-06-14 14:06:59,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3387, PETRI_PLACES=254, PETRI_TRANSITIONS=265} [2024-06-14 14:06:59,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-14 14:06:59,885 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 265 transitions, 3387 flow [2024-06-14 14:06:59,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:59,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:59,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:59,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:06:59,885 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)] === [2024-06-14 14:06:59,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash -198100678, now seen corresponding path program 7 times [2024-06-14 14:06:59,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:59,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48663904] [2024-06-14 14:06:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:59,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:00,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:00,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48663904] [2024-06-14 14:07:00,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48663904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:00,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:00,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:00,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034728972] [2024-06-14 14:07:00,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:00,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:00,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:00,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:00,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:00,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:00,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 265 transitions, 3387 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:00,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:00,677 INFO L124 PetriNetUnfolderBase]: 2008/3391 cut-off events. [2024-06-14 14:07:00,678 INFO L125 PetriNetUnfolderBase]: For 340643/340643 co-relation queries the response was YES. [2024-06-14 14:07:00,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24843 conditions, 3391 events. 2008/3391 cut-off events. For 340643/340643 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21041 event pairs, 613 based on Foata normal form. 1/3391 useless extension candidates. Maximal degree in co-relation 24729. Up to 2905 conditions per place. [2024-06-14 14:07:00,715 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 149 changer transitions 0/291 dead transitions. [2024-06-14 14:07:00,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 291 transitions, 4175 flow [2024-06-14 14:07:00,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:07:00,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:07:00,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 293 transitions. [2024-06-14 14:07:00,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48833333333333334 [2024-06-14 14:07:00,716 INFO L175 Difference]: Start difference. First operand has 254 places, 265 transitions, 3387 flow. Second operand 15 states and 293 transitions. [2024-06-14 14:07:00,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 291 transitions, 4175 flow [2024-06-14 14:07:01,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 291 transitions, 4033 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:01,342 INFO L231 Difference]: Finished difference. Result has 265 places, 268 transitions, 3575 flow [2024-06-14 14:07:01,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3575, PETRI_PLACES=265, PETRI_TRANSITIONS=268} [2024-06-14 14:07:01,343 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-14 14:07:01,343 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 268 transitions, 3575 flow [2024-06-14 14:07:01,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:01,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:01,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:01,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:07:01,343 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)] === [2024-06-14 14:07:01,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:01,343 INFO L85 PathProgramCache]: Analyzing trace with hash 510740056, now seen corresponding path program 8 times [2024-06-14 14:07:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:01,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031349957] [2024-06-14 14:07:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031349957] [2024-06-14 14:07:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031349957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:01,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:01,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:01,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256282586] [2024-06-14 14:07:01,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:01,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:01,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:01,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:01,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:01,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 268 transitions, 3575 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:01,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:01,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:01,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:02,150 INFO L124 PetriNetUnfolderBase]: 2013/3393 cut-off events. [2024-06-14 14:07:02,150 INFO L125 PetriNetUnfolderBase]: For 350460/350460 co-relation queries the response was YES. [2024-06-14 14:07:02,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25141 conditions, 3393 events. 2013/3393 cut-off events. For 350460/350460 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 21008 event pairs, 589 based on Foata normal form. 1/3394 useless extension candidates. Maximal degree in co-relation 25026. Up to 3120 conditions per place. [2024-06-14 14:07:02,187 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 246 selfloop transitions, 33 changer transitions 0/285 dead transitions. [2024-06-14 14:07:02,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 285 transitions, 4199 flow [2024-06-14 14:07:02,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:02,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:02,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 14:07:02,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-14 14:07:02,188 INFO L175 Difference]: Start difference. First operand has 265 places, 268 transitions, 3575 flow. Second operand 7 states and 151 transitions. [2024-06-14 14:07:02,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 285 transitions, 4199 flow [2024-06-14 14:07:02,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 285 transitions, 3812 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-14 14:07:02,857 INFO L231 Difference]: Finished difference. Result has 259 places, 271 transitions, 3302 flow [2024-06-14 14:07:02,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3200, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3302, PETRI_PLACES=259, PETRI_TRANSITIONS=271} [2024-06-14 14:07:02,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-14 14:07:02,858 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 271 transitions, 3302 flow [2024-06-14 14:07:02,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:02,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:02,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:02,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:07:02,858 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:02,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1934031918, now seen corresponding path program 9 times [2024-06-14 14:07:02,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:02,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317583537] [2024-06-14 14:07:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:02,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:03,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:03,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317583537] [2024-06-14 14:07:03,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317583537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:03,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:03,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058574952] [2024-06-14 14:07:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:03,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:03,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 271 transitions, 3302 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:03,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:03,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:03,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:03,666 INFO L124 PetriNetUnfolderBase]: 2010/3396 cut-off events. [2024-06-14 14:07:03,666 INFO L125 PetriNetUnfolderBase]: For 356642/356642 co-relation queries the response was YES. [2024-06-14 14:07:03,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24735 conditions, 3396 events. 2010/3396 cut-off events. For 356642/356642 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21059 event pairs, 613 based on Foata normal form. 1/3396 useless extension candidates. Maximal degree in co-relation 24620. Up to 2908 conditions per place. [2024-06-14 14:07:03,703 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 137 selfloop transitions, 152 changer transitions 0/295 dead transitions. [2024-06-14 14:07:03,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 295 transitions, 3934 flow [2024-06-14 14:07:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-14 14:07:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-14 14:07:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 326 transitions. [2024-06-14 14:07:03,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47941176470588237 [2024-06-14 14:07:03,704 INFO L175 Difference]: Start difference. First operand has 259 places, 271 transitions, 3302 flow. Second operand 17 states and 326 transitions. [2024-06-14 14:07:03,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 295 transitions, 3934 flow [2024-06-14 14:07:04,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 295 transitions, 3866 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:04,370 INFO L231 Difference]: Finished difference. Result has 270 places, 271 transitions, 3544 flow [2024-06-14 14:07:04,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3544, PETRI_PLACES=270, PETRI_TRANSITIONS=271} [2024-06-14 14:07:04,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-14 14:07:04,371 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 271 transitions, 3544 flow [2024-06-14 14:07:04,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:04,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:04,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:04,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:07:04,371 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:04,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1435615718, now seen corresponding path program 10 times [2024-06-14 14:07:04,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:04,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501668855] [2024-06-14 14:07:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:04,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:04,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501668855] [2024-06-14 14:07:04,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501668855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:04,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:04,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:04,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847011724] [2024-06-14 14:07:04,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:04,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:04,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:04,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:04,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 271 transitions, 3544 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:04,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:04,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:04,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:05,285 INFO L124 PetriNetUnfolderBase]: 2033/3433 cut-off events. [2024-06-14 14:07:05,285 INFO L125 PetriNetUnfolderBase]: For 375030/375030 co-relation queries the response was YES. [2024-06-14 14:07:05,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25046 conditions, 3433 events. 2033/3433 cut-off events. For 375030/375030 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21368 event pairs, 580 based on Foata normal form. 10/3443 useless extension candidates. Maximal degree in co-relation 24931. Up to 2909 conditions per place. [2024-06-14 14:07:05,323 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 255 selfloop transitions, 48 changer transitions 0/309 dead transitions. [2024-06-14 14:07:05,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 309 transitions, 4270 flow [2024-06-14 14:07:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:07:05,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-14 14:07:05,324 INFO L175 Difference]: Start difference. First operand has 270 places, 271 transitions, 3544 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:07:05,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 309 transitions, 4270 flow [2024-06-14 14:07:06,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 309 transitions, 3952 flow, removed 3 selfloop flow, removed 16 redundant places. [2024-06-14 14:07:06,076 INFO L231 Difference]: Finished difference. Result has 262 places, 272 transitions, 3352 flow [2024-06-14 14:07:06,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3226, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3352, PETRI_PLACES=262, PETRI_TRANSITIONS=272} [2024-06-14 14:07:06,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-14 14:07:06,076 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 272 transitions, 3352 flow [2024-06-14 14:07:06,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:06,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:06,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:07:06,077 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:06,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash -2054064536, now seen corresponding path program 11 times [2024-06-14 14:07:06,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:06,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284633365] [2024-06-14 14:07:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:06,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:06,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:06,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:06,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284633365] [2024-06-14 14:07:06,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284633365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:06,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:06,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:06,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559171864] [2024-06-14 14:07:06,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:06,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:06,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:06,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:06,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:06,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 272 transitions, 3352 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:06,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:06,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:06,799 INFO L124 PetriNetUnfolderBase]: 2028/3433 cut-off events. [2024-06-14 14:07:06,799 INFO L125 PetriNetUnfolderBase]: For 358981/358987 co-relation queries the response was YES. [2024-06-14 14:07:06,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24925 conditions, 3433 events. 2028/3433 cut-off events. For 358981/358987 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21383 event pairs, 605 based on Foata normal form. 8/3441 useless extension candidates. Maximal degree in co-relation 24809. Up to 3064 conditions per place. [2024-06-14 14:07:06,836 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 249 selfloop transitions, 44 changer transitions 0/299 dead transitions. [2024-06-14 14:07:06,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 299 transitions, 4006 flow [2024-06-14 14:07:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 14:07:06,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-14 14:07:06,837 INFO L175 Difference]: Start difference. First operand has 262 places, 272 transitions, 3352 flow. Second operand 7 states and 162 transitions. [2024-06-14 14:07:06,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 299 transitions, 4006 flow [2024-06-14 14:07:07,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 299 transitions, 3890 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:07,569 INFO L231 Difference]: Finished difference. Result has 263 places, 272 transitions, 3332 flow [2024-06-14 14:07:07,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3332, PETRI_PLACES=263, PETRI_TRANSITIONS=272} [2024-06-14 14:07:07,570 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-14 14:07:07,570 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 272 transitions, 3332 flow [2024-06-14 14:07:07,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:07,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:07,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:07:07,571 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:07,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:07,571 INFO L85 PathProgramCache]: Analyzing trace with hash -125435228, now seen corresponding path program 12 times [2024-06-14 14:07:07,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:07,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142364890] [2024-06-14 14:07:07,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:07,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:07,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142364890] [2024-06-14 14:07:07,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142364890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:07,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:07,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:07,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031645169] [2024-06-14 14:07:07,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:07,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:07,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:07,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:07,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:07,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:07,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 272 transitions, 3332 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:07,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:07,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:07,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:08,336 INFO L124 PetriNetUnfolderBase]: 2023/3424 cut-off events. [2024-06-14 14:07:08,336 INFO L125 PetriNetUnfolderBase]: For 353237/353243 co-relation queries the response was YES. [2024-06-14 14:07:08,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24629 conditions, 3424 events. 2023/3424 cut-off events. For 353237/353243 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21390 event pairs, 512 based on Foata normal form. 8/3432 useless extension candidates. Maximal degree in co-relation 24512. Up to 2816 conditions per place. [2024-06-14 14:07:08,382 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 241 selfloop transitions, 56 changer transitions 0/303 dead transitions. [2024-06-14 14:07:08,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 303 transitions, 4016 flow [2024-06-14 14:07:08,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:07:08,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-14 14:07:08,383 INFO L175 Difference]: Start difference. First operand has 263 places, 272 transitions, 3332 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:07:08,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 303 transitions, 4016 flow [2024-06-14 14:07:09,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 303 transitions, 3902 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:09,148 INFO L231 Difference]: Finished difference. Result has 264 places, 272 transitions, 3338 flow [2024-06-14 14:07:09,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3338, PETRI_PLACES=264, PETRI_TRANSITIONS=272} [2024-06-14 14:07:09,149 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-14 14:07:09,149 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 272 transitions, 3338 flow [2024-06-14 14:07:09,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:09,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:09,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:09,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:07:09,149 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:09,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1774762972, now seen corresponding path program 2 times [2024-06-14 14:07:09,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:09,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381879808] [2024-06-14 14:07:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:09,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:09,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:09,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381879808] [2024-06-14 14:07:09,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381879808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:09,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:09,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:09,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636638578] [2024-06-14 14:07:09,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:09,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:09,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:09,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 272 transitions, 3338 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:09,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:09,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:09,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:10,064 INFO L124 PetriNetUnfolderBase]: 2359/4018 cut-off events. [2024-06-14 14:07:10,064 INFO L125 PetriNetUnfolderBase]: For 564568/564568 co-relation queries the response was YES. [2024-06-14 14:07:10,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30051 conditions, 4018 events. 2359/4018 cut-off events. For 564568/564568 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25949 event pairs, 597 based on Foata normal form. 36/4054 useless extension candidates. Maximal degree in co-relation 29933. Up to 2656 conditions per place. [2024-06-14 14:07:10,106 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 252 selfloop transitions, 57 changer transitions 0/315 dead transitions. [2024-06-14 14:07:10,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 315 transitions, 4310 flow [2024-06-14 14:07:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:07:10,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-14 14:07:10,107 INFO L175 Difference]: Start difference. First operand has 264 places, 272 transitions, 3338 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:07:10,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 315 transitions, 4310 flow [2024-06-14 14:07:11,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 315 transitions, 4152 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:11,186 INFO L231 Difference]: Finished difference. Result has 265 places, 276 transitions, 3412 flow [2024-06-14 14:07:11,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3412, PETRI_PLACES=265, PETRI_TRANSITIONS=276} [2024-06-14 14:07:11,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-14 14:07:11,187 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 276 transitions, 3412 flow [2024-06-14 14:07:11,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:11,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:11,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:07:11,187 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)] === [2024-06-14 14:07:11,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:11,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1442295412, now seen corresponding path program 3 times [2024-06-14 14:07:11,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:11,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14492943] [2024-06-14 14:07:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:11,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14492943] [2024-06-14 14:07:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14492943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:11,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:11,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297780116] [2024-06-14 14:07:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:11,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:11,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:11,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 276 transitions, 3412 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:11,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:11,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:12,176 INFO L124 PetriNetUnfolderBase]: 2642/4529 cut-off events. [2024-06-14 14:07:12,177 INFO L125 PetriNetUnfolderBase]: For 660242/660242 co-relation queries the response was YES. [2024-06-14 14:07:12,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34945 conditions, 4529 events. 2642/4529 cut-off events. For 660242/660242 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30202 event pairs, 812 based on Foata normal form. 30/4559 useless extension candidates. Maximal degree in co-relation 34826. Up to 2828 conditions per place. [2024-06-14 14:07:12,231 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 228 selfloop transitions, 88 changer transitions 0/322 dead transitions. [2024-06-14 14:07:12,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 322 transitions, 4398 flow [2024-06-14 14:07:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-14 14:07:12,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2024-06-14 14:07:12,232 INFO L175 Difference]: Start difference. First operand has 265 places, 276 transitions, 3412 flow. Second operand 12 states and 259 transitions. [2024-06-14 14:07:12,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 322 transitions, 4398 flow [2024-06-14 14:07:13,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 322 transitions, 4306 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:13,432 INFO L231 Difference]: Finished difference. Result has 273 places, 278 transitions, 3598 flow [2024-06-14 14:07:13,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3598, PETRI_PLACES=273, PETRI_TRANSITIONS=278} [2024-06-14 14:07:13,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-14 14:07:13,433 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 278 transitions, 3598 flow [2024-06-14 14:07:13,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:13,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:13,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:13,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:07:13,433 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)] === [2024-06-14 14:07:13,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:13,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1998724820, now seen corresponding path program 4 times [2024-06-14 14:07:13,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:13,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407690488] [2024-06-14 14:07:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:13,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:13,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:13,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407690488] [2024-06-14 14:07:13,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407690488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:13,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:13,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:13,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756429347] [2024-06-14 14:07:13,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:13,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:13,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:13,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:13,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:13,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:13,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 278 transitions, 3598 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:13,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:13,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:13,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:14,626 INFO L124 PetriNetUnfolderBase]: 2886/4973 cut-off events. [2024-06-14 14:07:14,626 INFO L125 PetriNetUnfolderBase]: For 734562/734562 co-relation queries the response was YES. [2024-06-14 14:07:14,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38182 conditions, 4973 events. 2886/4973 cut-off events. For 734562/734562 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 34074 event pairs, 787 based on Foata normal form. 36/5009 useless extension candidates. Maximal degree in co-relation 38062. Up to 2884 conditions per place. [2024-06-14 14:07:14,676 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 256 selfloop transitions, 66 changer transitions 0/328 dead transitions. [2024-06-14 14:07:14,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 328 transitions, 4764 flow [2024-06-14 14:07:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 14:07:14,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-14 14:07:14,677 INFO L175 Difference]: Start difference. First operand has 273 places, 278 transitions, 3598 flow. Second operand 8 states and 203 transitions. [2024-06-14 14:07:14,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 328 transitions, 4764 flow [2024-06-14 14:07:15,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 328 transitions, 4586 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:15,797 INFO L231 Difference]: Finished difference. Result has 274 places, 281 transitions, 3669 flow [2024-06-14 14:07:15,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3426, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3669, PETRI_PLACES=274, PETRI_TRANSITIONS=281} [2024-06-14 14:07:15,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-14 14:07:15,798 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 281 transitions, 3669 flow [2024-06-14 14:07:15,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:15,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:15,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:15,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:07:15,798 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)] === [2024-06-14 14:07:15,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1180296420, now seen corresponding path program 1 times [2024-06-14 14:07:15,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:15,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552946175] [2024-06-14 14:07:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:15,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:15,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552946175] [2024-06-14 14:07:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552946175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:15,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109664578] [2024-06-14 14:07:15,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:15,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:15,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:15,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:15,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:16,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:16,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 281 transitions, 3669 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:16,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:16,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:16,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:16,784 INFO L124 PetriNetUnfolderBase]: 2959/5096 cut-off events. [2024-06-14 14:07:16,784 INFO L125 PetriNetUnfolderBase]: For 680099/680099 co-relation queries the response was YES. [2024-06-14 14:07:16,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39676 conditions, 5096 events. 2959/5096 cut-off events. For 680099/680099 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35152 event pairs, 1008 based on Foata normal form. 6/5084 useless extension candidates. Maximal degree in co-relation 39553. Up to 3756 conditions per place. [2024-06-14 14:07:16,843 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 237 selfloop transitions, 76 changer transitions 0/319 dead transitions. [2024-06-14 14:07:16,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 319 transitions, 4743 flow [2024-06-14 14:07:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:16,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:07:16,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:07:16,844 INFO L175 Difference]: Start difference. First operand has 274 places, 281 transitions, 3669 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:07:16,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 319 transitions, 4743 flow [2024-06-14 14:07:18,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 319 transitions, 4551 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:18,202 INFO L231 Difference]: Finished difference. Result has 275 places, 284 transitions, 3675 flow [2024-06-14 14:07:18,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3675, PETRI_PLACES=275, PETRI_TRANSITIONS=284} [2024-06-14 14:07:18,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 234 predicate places. [2024-06-14 14:07:18,203 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 284 transitions, 3675 flow [2024-06-14 14:07:18,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:18,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:18,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:18,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:07:18,203 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)] === [2024-06-14 14:07:18,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:18,203 INFO L85 PathProgramCache]: Analyzing trace with hash -339940922, now seen corresponding path program 2 times [2024-06-14 14:07:18,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:18,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113558533] [2024-06-14 14:07:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:18,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:18,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:18,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113558533] [2024-06-14 14:07:18,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113558533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:18,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:18,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:18,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078188786] [2024-06-14 14:07:18,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:18,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:18,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:18,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:18,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:18,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:18,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 284 transitions, 3675 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:18,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:18,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:18,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:19,311 INFO L124 PetriNetUnfolderBase]: 2852/4924 cut-off events. [2024-06-14 14:07:19,312 INFO L125 PetriNetUnfolderBase]: For 609698/609698 co-relation queries the response was YES. [2024-06-14 14:07:19,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36865 conditions, 4924 events. 2852/4924 cut-off events. For 609698/609698 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33911 event pairs, 1014 based on Foata normal form. 6/4929 useless extension candidates. Maximal degree in co-relation 36743. Up to 4288 conditions per place. [2024-06-14 14:07:19,365 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 242 selfloop transitions, 73 changer transitions 0/321 dead transitions. [2024-06-14 14:07:19,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 321 transitions, 4577 flow [2024-06-14 14:07:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 14:07:19,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-14 14:07:19,366 INFO L175 Difference]: Start difference. First operand has 275 places, 284 transitions, 3675 flow. Second operand 8 states and 186 transitions. [2024-06-14 14:07:19,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 321 transitions, 4577 flow [2024-06-14 14:07:20,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 321 transitions, 4493 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:20,430 INFO L231 Difference]: Finished difference. Result has 281 places, 285 transitions, 3761 flow [2024-06-14 14:07:20,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3761, PETRI_PLACES=281, PETRI_TRANSITIONS=285} [2024-06-14 14:07:20,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 240 predicate places. [2024-06-14 14:07:20,431 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 285 transitions, 3761 flow [2024-06-14 14:07:20,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:20,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:20,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:20,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:07:20,431 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)] === [2024-06-14 14:07:20,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:20,431 INFO L85 PathProgramCache]: Analyzing trace with hash -180028864, now seen corresponding path program 3 times [2024-06-14 14:07:20,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:20,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239121720] [2024-06-14 14:07:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:20,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:20,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239121720] [2024-06-14 14:07:20,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239121720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:20,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:20,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:20,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301101739] [2024-06-14 14:07:20,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:20,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:20,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:20,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:20,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 285 transitions, 3761 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:20,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:20,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:20,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:21,414 INFO L124 PetriNetUnfolderBase]: 2834/4886 cut-off events. [2024-06-14 14:07:21,414 INFO L125 PetriNetUnfolderBase]: For 578752/578752 co-relation queries the response was YES. [2024-06-14 14:07:21,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36061 conditions, 4886 events. 2834/4886 cut-off events. For 578752/578752 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 33638 event pairs, 1094 based on Foata normal form. 8/4893 useless extension candidates. Maximal degree in co-relation 35937. Up to 4368 conditions per place. [2024-06-14 14:07:21,470 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 244 selfloop transitions, 63 changer transitions 0/313 dead transitions. [2024-06-14 14:07:21,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 313 transitions, 4457 flow [2024-06-14 14:07:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:07:21,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-14 14:07:21,471 INFO L175 Difference]: Start difference. First operand has 281 places, 285 transitions, 3761 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:07:21,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 313 transitions, 4457 flow [2024-06-14 14:07:22,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 313 transitions, 4307 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:22,410 INFO L231 Difference]: Finished difference. Result has 283 places, 285 transitions, 3742 flow [2024-06-14 14:07:22,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3742, PETRI_PLACES=283, PETRI_TRANSITIONS=285} [2024-06-14 14:07:22,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-14 14:07:22,411 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 285 transitions, 3742 flow [2024-06-14 14:07:22,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:22,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:22,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:22,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:07:22,412 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)] === [2024-06-14 14:07:22,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:22,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1349769986, now seen corresponding path program 4 times [2024-06-14 14:07:22,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:22,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086425199] [2024-06-14 14:07:22,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:22,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:22,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086425199] [2024-06-14 14:07:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086425199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:22,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:22,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705626003] [2024-06-14 14:07:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:22,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:22,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:22,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:22,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 285 transitions, 3742 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:22,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:22,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:22,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:23,485 INFO L124 PetriNetUnfolderBase]: 2854/4924 cut-off events. [2024-06-14 14:07:23,485 INFO L125 PetriNetUnfolderBase]: For 587746/587746 co-relation queries the response was YES. [2024-06-14 14:07:23,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36318 conditions, 4924 events. 2854/4924 cut-off events. For 587746/587746 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 34050 event pairs, 1094 based on Foata normal form. 6/4927 useless extension candidates. Maximal degree in co-relation 36193. Up to 4370 conditions per place. [2024-06-14 14:07:23,534 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 246 selfloop transitions, 66 changer transitions 0/318 dead transitions. [2024-06-14 14:07:23,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 318 transitions, 4476 flow [2024-06-14 14:07:23,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:23,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 14:07:23,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:07:23,535 INFO L175 Difference]: Start difference. First operand has 283 places, 285 transitions, 3742 flow. Second operand 9 states and 198 transitions. [2024-06-14 14:07:23,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 318 transitions, 4476 flow [2024-06-14 14:07:24,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 318 transitions, 4330 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:24,338 INFO L231 Difference]: Finished difference. Result has 285 places, 286 transitions, 3746 flow [2024-06-14 14:07:24,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3596, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3746, PETRI_PLACES=285, PETRI_TRANSITIONS=286} [2024-06-14 14:07:24,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-14 14:07:24,339 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 286 transitions, 3746 flow [2024-06-14 14:07:24,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:24,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:24,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:24,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:07:24,340 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)] === [2024-06-14 14:07:24,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:24,340 INFO L85 PathProgramCache]: Analyzing trace with hash -977561112, now seen corresponding path program 5 times [2024-06-14 14:07:24,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:24,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315046247] [2024-06-14 14:07:24,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:24,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:24,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:24,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315046247] [2024-06-14 14:07:24,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315046247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:24,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:24,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:24,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481557789] [2024-06-14 14:07:24,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:24,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:24,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:24,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:24,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:24,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:24,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 286 transitions, 3746 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:24,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:24,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:24,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:25,332 INFO L124 PetriNetUnfolderBase]: 2882/4974 cut-off events. [2024-06-14 14:07:25,332 INFO L125 PetriNetUnfolderBase]: For 608416/608416 co-relation queries the response was YES. [2024-06-14 14:07:25,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36700 conditions, 4974 events. 2882/4974 cut-off events. For 608416/608416 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 34441 event pairs, 1108 based on Foata normal form. 8/4981 useless extension candidates. Maximal degree in co-relation 36574. Up to 4444 conditions per place. [2024-06-14 14:07:25,390 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 245 selfloop transitions, 61 changer transitions 0/312 dead transitions. [2024-06-14 14:07:25,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 312 transitions, 4444 flow [2024-06-14 14:07:25,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:25,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 14:07:25,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:07:25,392 INFO L175 Difference]: Start difference. First operand has 285 places, 286 transitions, 3746 flow. Second operand 8 states and 176 transitions. [2024-06-14 14:07:25,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 312 transitions, 4444 flow [2024-06-14 14:07:26,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 312 transitions, 4308 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:26,580 INFO L231 Difference]: Finished difference. Result has 286 places, 287 transitions, 3751 flow [2024-06-14 14:07:26,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3610, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3751, PETRI_PLACES=286, PETRI_TRANSITIONS=287} [2024-06-14 14:07:26,580 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 245 predicate places. [2024-06-14 14:07:26,580 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 287 transitions, 3751 flow [2024-06-14 14:07:26,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:26,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:26,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:07:26,581 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)] === [2024-06-14 14:07:26,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:26,581 INFO L85 PathProgramCache]: Analyzing trace with hash -976804410, now seen corresponding path program 6 times [2024-06-14 14:07:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227540529] [2024-06-14 14:07:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:26,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227540529] [2024-06-14 14:07:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227540529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:26,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:26,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:26,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111161594] [2024-06-14 14:07:26,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:26,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:26,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:26,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:26,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 287 transitions, 3751 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:26,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:26,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:27,555 INFO L124 PetriNetUnfolderBase]: 2902/5023 cut-off events. [2024-06-14 14:07:27,555 INFO L125 PetriNetUnfolderBase]: For 617118/617118 co-relation queries the response was YES. [2024-06-14 14:07:27,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37041 conditions, 5023 events. 2902/5023 cut-off events. For 617118/617118 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 34949 event pairs, 1110 based on Foata normal form. 6/5027 useless extension candidates. Maximal degree in co-relation 36914. Up to 4499 conditions per place. [2024-06-14 14:07:27,614 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 283 selfloop transitions, 25 changer transitions 0/314 dead transitions. [2024-06-14 14:07:27,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 314 transitions, 4617 flow [2024-06-14 14:07:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 14:07:27,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-14 14:07:27,615 INFO L175 Difference]: Start difference. First operand has 286 places, 287 transitions, 3751 flow. Second operand 8 states and 173 transitions. [2024-06-14 14:07:27,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 314 transitions, 4617 flow [2024-06-14 14:07:28,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 314 transitions, 4494 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:28,992 INFO L231 Difference]: Finished difference. Result has 289 places, 288 transitions, 3705 flow [2024-06-14 14:07:28,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3628, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3705, PETRI_PLACES=289, PETRI_TRANSITIONS=288} [2024-06-14 14:07:28,993 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-14 14:07:28,993 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 288 transitions, 3705 flow [2024-06-14 14:07:28,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:28,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:28,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:07:28,994 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:28,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:28,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1066211192, now seen corresponding path program 1 times [2024-06-14 14:07:28,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:28,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954608338] [2024-06-14 14:07:28,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:28,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:29,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:29,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954608338] [2024-06-14 14:07:29,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954608338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:29,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:29,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:29,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531932680] [2024-06-14 14:07:29,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:29,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:29,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 288 transitions, 3705 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:29,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:29,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:29,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:30,050 INFO L124 PetriNetUnfolderBase]: 2922/5034 cut-off events. [2024-06-14 14:07:30,050 INFO L125 PetriNetUnfolderBase]: For 634555/634555 co-relation queries the response was YES. [2024-06-14 14:07:30,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37356 conditions, 5034 events. 2922/5034 cut-off events. For 634555/634555 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 34480 event pairs, 988 based on Foata normal form. 6/5031 useless extension candidates. Maximal degree in co-relation 37227. Up to 3607 conditions per place. [2024-06-14 14:07:30,101 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 232 selfloop transitions, 86 changer transitions 0/324 dead transitions. [2024-06-14 14:07:30,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 324 transitions, 4777 flow [2024-06-14 14:07:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:30,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:07:30,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:07:30,103 INFO L175 Difference]: Start difference. First operand has 289 places, 288 transitions, 3705 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:07:30,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 324 transitions, 4777 flow [2024-06-14 14:07:31,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 324 transitions, 4726 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:31,302 INFO L231 Difference]: Finished difference. Result has 291 places, 289 transitions, 3846 flow [2024-06-14 14:07:31,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3846, PETRI_PLACES=291, PETRI_TRANSITIONS=289} [2024-06-14 14:07:31,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 250 predicate places. [2024-06-14 14:07:31,303 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 289 transitions, 3846 flow [2024-06-14 14:07:31,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:31,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:31,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:31,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:07:31,304 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:31,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1165387834, now seen corresponding path program 2 times [2024-06-14 14:07:31,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:31,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786173390] [2024-06-14 14:07:31,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:31,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:31,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:31,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786173390] [2024-06-14 14:07:31,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786173390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:31,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:31,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:31,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710118622] [2024-06-14 14:07:31,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:31,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:31,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:31,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:31,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:31,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:31,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 289 transitions, 3846 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:31,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:31,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:31,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:32,330 INFO L124 PetriNetUnfolderBase]: 2942/5077 cut-off events. [2024-06-14 14:07:32,331 INFO L125 PetriNetUnfolderBase]: For 651699/651699 co-relation queries the response was YES. [2024-06-14 14:07:32,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38076 conditions, 5077 events. 2942/5077 cut-off events. For 651699/651699 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35378 event pairs, 1097 based on Foata normal form. 6/5078 useless extension candidates. Maximal degree in co-relation 37946. Up to 4240 conditions per place. [2024-06-14 14:07:32,387 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 248 selfloop transitions, 71 changer transitions 0/325 dead transitions. [2024-06-14 14:07:32,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 325 transitions, 4618 flow [2024-06-14 14:07:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:32,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 14:07:32,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-14 14:07:32,388 INFO L175 Difference]: Start difference. First operand has 291 places, 289 transitions, 3846 flow. Second operand 8 states and 185 transitions. [2024-06-14 14:07:32,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 325 transitions, 4618 flow [2024-06-14 14:07:33,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 325 transitions, 4390 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:33,962 INFO L231 Difference]: Finished difference. Result has 294 places, 290 transitions, 3784 flow [2024-06-14 14:07:33,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3624, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3784, PETRI_PLACES=294, PETRI_TRANSITIONS=290} [2024-06-14 14:07:33,963 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-14 14:07:33,963 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 290 transitions, 3784 flow [2024-06-14 14:07:33,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:33,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:33,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:33,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:07:33,963 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:33,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:33,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1809937117, now seen corresponding path program 1 times [2024-06-14 14:07:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021317024] [2024-06-14 14:07:33,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:33,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:34,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021317024] [2024-06-14 14:07:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021317024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:34,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:34,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:34,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757480230] [2024-06-14 14:07:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:34,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:34,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:34,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:34,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 290 transitions, 3784 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:34,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:34,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:35,359 INFO L124 PetriNetUnfolderBase]: 3670/6296 cut-off events. [2024-06-14 14:07:35,359 INFO L125 PetriNetUnfolderBase]: For 1160973/1160973 co-relation queries the response was YES. [2024-06-14 14:07:35,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53046 conditions, 6296 events. 3670/6296 cut-off events. For 1160973/1160973 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 45592 event pairs, 1448 based on Foata normal form. 30/6325 useless extension candidates. Maximal degree in co-relation 52915. Up to 4008 conditions per place. [2024-06-14 14:07:35,431 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 158 changer transitions 7/339 dead transitions. [2024-06-14 14:07:35,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 339 transitions, 4898 flow [2024-06-14 14:07:35,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:35,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-14 14:07:35,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-14 14:07:35,433 INFO L175 Difference]: Start difference. First operand has 294 places, 290 transitions, 3784 flow. Second operand 11 states and 246 transitions. [2024-06-14 14:07:35,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 339 transitions, 4898 flow [2024-06-14 14:07:37,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 339 transitions, 4752 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:37,190 INFO L231 Difference]: Finished difference. Result has 300 places, 294 transitions, 4112 flow [2024-06-14 14:07:37,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4112, PETRI_PLACES=300, PETRI_TRANSITIONS=294} [2024-06-14 14:07:37,191 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-14 14:07:37,191 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 294 transitions, 4112 flow [2024-06-14 14:07:37,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:37,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:37,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:07:37,191 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:37,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1076822074, now seen corresponding path program 3 times [2024-06-14 14:07:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:37,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032057250] [2024-06-14 14:07:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:37,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:37,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032057250] [2024-06-14 14:07:37,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032057250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:37,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:37,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132805238] [2024-06-14 14:07:37,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:37,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:37,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:37,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 294 transitions, 4112 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:37,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:37,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:37,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:38,457 INFO L124 PetriNetUnfolderBase]: 3640/6274 cut-off events. [2024-06-14 14:07:38,457 INFO L125 PetriNetUnfolderBase]: For 1113318/1113318 co-relation queries the response was YES. [2024-06-14 14:07:38,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53549 conditions, 6274 events. 3640/6274 cut-off events. For 1113318/1113318 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45666 event pairs, 1552 based on Foata normal form. 6/6275 useless extension candidates. Maximal degree in co-relation 53416. Up to 5606 conditions per place. [2024-06-14 14:07:38,532 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 255 selfloop transitions, 63 changer transitions 0/324 dead transitions. [2024-06-14 14:07:38,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 324 transitions, 4850 flow [2024-06-14 14:07:38,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 14:07:38,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:07:38,533 INFO L175 Difference]: Start difference. First operand has 300 places, 294 transitions, 4112 flow. Second operand 9 states and 195 transitions. [2024-06-14 14:07:38,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 324 transitions, 4850 flow [2024-06-14 14:07:40,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 324 transitions, 4563 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:40,394 INFO L231 Difference]: Finished difference. Result has 301 places, 295 transitions, 3971 flow [2024-06-14 14:07:40,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3971, PETRI_PLACES=301, PETRI_TRANSITIONS=295} [2024-06-14 14:07:40,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-14 14:07:40,395 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 295 transitions, 3971 flow [2024-06-14 14:07:40,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:40,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:40,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:07:40,395 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:40,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:40,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1076821733, now seen corresponding path program 2 times [2024-06-14 14:07:40,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:40,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548106039] [2024-06-14 14:07:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:40,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:40,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548106039] [2024-06-14 14:07:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548106039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:40,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844829733] [2024-06-14 14:07:40,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:40,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:40,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:40,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:40,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 295 transitions, 3971 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:40,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:40,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:40,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:41,935 INFO L124 PetriNetUnfolderBase]: 3888/6700 cut-off events. [2024-06-14 14:07:41,936 INFO L125 PetriNetUnfolderBase]: For 1328004/1328004 co-relation queries the response was YES. [2024-06-14 14:07:41,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57958 conditions, 6700 events. 3888/6700 cut-off events. For 1328004/1328004 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 49406 event pairs, 1648 based on Foata normal form. 30/6729 useless extension candidates. Maximal degree in co-relation 57824. Up to 5529 conditions per place. [2024-06-14 14:07:42,008 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 175 selfloop transitions, 150 changer transitions 4/335 dead transitions. [2024-06-14 14:07:42,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 335 transitions, 4977 flow [2024-06-14 14:07:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-14 14:07:42,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:07:42,010 INFO L175 Difference]: Start difference. First operand has 301 places, 295 transitions, 3971 flow. Second operand 12 states and 256 transitions. [2024-06-14 14:07:42,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 335 transitions, 4977 flow [2024-06-14 14:07:43,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 335 transitions, 4845 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:43,874 INFO L231 Difference]: Finished difference. Result has 306 places, 296 transitions, 4182 flow [2024-06-14 14:07:43,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3839, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4182, PETRI_PLACES=306, PETRI_TRANSITIONS=296} [2024-06-14 14:07:43,874 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-14 14:07:43,874 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 296 transitions, 4182 flow [2024-06-14 14:07:43,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:43,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:43,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:07:43,875 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:43,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1076673863, now seen corresponding path program 3 times [2024-06-14 14:07:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:43,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124252078] [2024-06-14 14:07:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124252078] [2024-06-14 14:07:44,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124252078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:44,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:44,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:44,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475589865] [2024-06-14 14:07:44,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:44,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:44,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:44,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:44,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:44,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 296 transitions, 4182 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:44,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:44,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:44,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:45,149 INFO L124 PetriNetUnfolderBase]: 3789/6541 cut-off events. [2024-06-14 14:07:45,149 INFO L125 PetriNetUnfolderBase]: For 1257655/1257655 co-relation queries the response was YES. [2024-06-14 14:07:45,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55033 conditions, 6541 events. 3789/6541 cut-off events. For 1257655/1257655 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 48119 event pairs, 1645 based on Foata normal form. 34/6574 useless extension candidates. Maximal degree in co-relation 54898. Up to 5669 conditions per place. [2024-06-14 14:07:45,228 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 171 selfloop transitions, 145 changer transitions 4/326 dead transitions. [2024-06-14 14:07:45,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 326 transitions, 4914 flow [2024-06-14 14:07:45,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 14:07:45,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-14 14:07:45,229 INFO L175 Difference]: Start difference. First operand has 306 places, 296 transitions, 4182 flow. Second operand 11 states and 232 transitions. [2024-06-14 14:07:45,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 326 transitions, 4914 flow [2024-06-14 14:07:47,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 326 transitions, 4683 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:47,280 INFO L231 Difference]: Finished difference. Result has 309 places, 294 transitions, 4216 flow [2024-06-14 14:07:47,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4216, PETRI_PLACES=309, PETRI_TRANSITIONS=294} [2024-06-14 14:07:47,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-14 14:07:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 294 transitions, 4216 flow [2024-06-14 14:07:47,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:47,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:47,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:07:47,281 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:47,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:47,282 INFO L85 PathProgramCache]: Analyzing trace with hash -659021829, now seen corresponding path program 4 times [2024-06-14 14:07:47,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:47,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272118468] [2024-06-14 14:07:47,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:47,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:47,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:47,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272118468] [2024-06-14 14:07:47,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272118468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:47,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:47,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:47,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374406384] [2024-06-14 14:07:47,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:47,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:47,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:47,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:47,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 294 transitions, 4216 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:47,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:47,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:47,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:48,566 INFO L124 PetriNetUnfolderBase]: 3621/6226 cut-off events. [2024-06-14 14:07:48,567 INFO L125 PetriNetUnfolderBase]: For 1284936/1284936 co-relation queries the response was YES. [2024-06-14 14:07:48,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54284 conditions, 6226 events. 3621/6226 cut-off events. For 1284936/1284936 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 45233 event pairs, 1529 based on Foata normal form. 34/6260 useless extension candidates. Maximal degree in co-relation 54147. Up to 5566 conditions per place. [2024-06-14 14:07:48,640 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 264 selfloop transitions, 38 changer transitions 15/323 dead transitions. [2024-06-14 14:07:48,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 323 transitions, 4965 flow [2024-06-14 14:07:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-14 14:07:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:07:48,641 INFO L175 Difference]: Start difference. First operand has 309 places, 294 transitions, 4216 flow. Second operand 12 states and 240 transitions. [2024-06-14 14:07:48,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 323 transitions, 4965 flow [2024-06-14 14:07:51,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 323 transitions, 4660 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:51,240 INFO L231 Difference]: Finished difference. Result has 311 places, 288 transitions, 3887 flow [2024-06-14 14:07:51,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3911, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3887, PETRI_PLACES=311, PETRI_TRANSITIONS=288} [2024-06-14 14:07:51,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-14 14:07:51,241 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 288 transitions, 3887 flow [2024-06-14 14:07:51,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:51,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:51,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:07:51,241 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:51,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1698313627, now seen corresponding path program 5 times [2024-06-14 14:07:51,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950640437] [2024-06-14 14:07:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:51,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950640437] [2024-06-14 14:07:51,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950640437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:51,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:51,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610007956] [2024-06-14 14:07:51,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:51,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:51,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:51,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 288 transitions, 3887 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:51,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:51,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:52,474 INFO L124 PetriNetUnfolderBase]: 3427/5928 cut-off events. [2024-06-14 14:07:52,474 INFO L125 PetriNetUnfolderBase]: For 1187503/1187503 co-relation queries the response was YES. [2024-06-14 14:07:52,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50032 conditions, 5928 events. 3427/5928 cut-off events. For 1187503/1187503 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 42871 event pairs, 1449 based on Foata normal form. 34/5962 useless extension candidates. Maximal degree in co-relation 49894. Up to 5268 conditions per place. [2024-06-14 14:07:52,547 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 263 selfloop transitions, 34 changer transitions 13/316 dead transitions. [2024-06-14 14:07:52,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 316 transitions, 4593 flow [2024-06-14 14:07:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-14 14:07:52,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49583333333333335 [2024-06-14 14:07:52,548 INFO L175 Difference]: Start difference. First operand has 311 places, 288 transitions, 3887 flow. Second operand 12 states and 238 transitions. [2024-06-14 14:07:52,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 316 transitions, 4593 flow [2024-06-14 14:07:54,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 316 transitions, 4507 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:54,957 INFO L231 Difference]: Finished difference. Result has 310 places, 283 transitions, 3766 flow [2024-06-14 14:07:54,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3801, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3766, PETRI_PLACES=310, PETRI_TRANSITIONS=283} [2024-06-14 14:07:54,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-14 14:07:54,957 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 283 transitions, 3766 flow [2024-06-14 14:07:54,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:54,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:54,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:54,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:07:54,958 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:54,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:54,958 INFO L85 PathProgramCache]: Analyzing trace with hash -858471489, now seen corresponding path program 6 times [2024-06-14 14:07:54,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:54,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095205588] [2024-06-14 14:07:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:54,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:55,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:55,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095205588] [2024-06-14 14:07:55,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095205588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:55,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:55,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:55,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576378535] [2024-06-14 14:07:55,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:55,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:55,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:55,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:55,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 283 transitions, 3766 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:55,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:55,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:55,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:56,284 INFO L124 PetriNetUnfolderBase]: 3379/5872 cut-off events. [2024-06-14 14:07:56,284 INFO L125 PetriNetUnfolderBase]: For 1170928/1170928 co-relation queries the response was YES. [2024-06-14 14:07:56,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49572 conditions, 5872 events. 3379/5872 cut-off events. For 1170928/1170928 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 42558 event pairs, 1405 based on Foata normal form. 30/5902 useless extension candidates. Maximal degree in co-relation 49434. Up to 5174 conditions per place. [2024-06-14 14:07:56,350 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 267 selfloop transitions, 35 changer transitions 8/316 dead transitions. [2024-06-14 14:07:56,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 316 transitions, 4523 flow [2024-06-14 14:07:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:07:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:07:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-14 14:07:56,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:07:56,351 INFO L175 Difference]: Start difference. First operand has 310 places, 283 transitions, 3766 flow. Second operand 12 states and 240 transitions. [2024-06-14 14:07:56,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 316 transitions, 4523 flow [2024-06-14 14:07:58,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 316 transitions, 4435 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-14 14:07:58,483 INFO L231 Difference]: Finished difference. Result has 308 places, 282 transitions, 3752 flow [2024-06-14 14:07:58,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3678, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3752, PETRI_PLACES=308, PETRI_TRANSITIONS=282} [2024-06-14 14:07:58,484 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-14 14:07:58,484 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 282 transitions, 3752 flow [2024-06-14 14:07:58,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:58,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:58,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:58,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:07:58,484 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:58,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:58,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1640624634, now seen corresponding path program 4 times [2024-06-14 14:07:58,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:58,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394244620] [2024-06-14 14:07:58,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:58,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:58,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:58,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394244620] [2024-06-14 14:07:58,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394244620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:58,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:58,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:58,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371014305] [2024-06-14 14:07:58,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:58,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:58,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:58,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:07:58,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 282 transitions, 3752 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:58,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:58,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:07:58,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:59,579 INFO L124 PetriNetUnfolderBase]: 3265/5662 cut-off events. [2024-06-14 14:07:59,579 INFO L125 PetriNetUnfolderBase]: For 1062128/1062128 co-relation queries the response was YES. [2024-06-14 14:07:59,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48249 conditions, 5662 events. 3265/5662 cut-off events. For 1062128/1062128 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 40575 event pairs, 1390 based on Foata normal form. 6/5664 useless extension candidates. Maximal degree in co-relation 48112. Up to 5143 conditions per place. [2024-06-14 14:07:59,649 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 277 selfloop transitions, 23 changer transitions 0/306 dead transitions. [2024-06-14 14:07:59,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 306 transitions, 4422 flow [2024-06-14 14:07:59,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 14:07:59,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 14:07:59,650 INFO L175 Difference]: Start difference. First operand has 308 places, 282 transitions, 3752 flow. Second operand 8 states and 170 transitions. [2024-06-14 14:07:59,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 306 transitions, 4422 flow [2024-06-14 14:08:01,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 306 transitions, 4328 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:08:01,598 INFO L231 Difference]: Finished difference. Result has 306 places, 282 transitions, 3708 flow [2024-06-14 14:08:01,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3708, PETRI_PLACES=306, PETRI_TRANSITIONS=282} [2024-06-14 14:08:01,598 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-14 14:08:01,598 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 282 transitions, 3708 flow [2024-06-14 14:08:01,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:01,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:01,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:01,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:08:01,599 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -651397317, now seen corresponding path program 1 times [2024-06-14 14:08:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:01,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820247894] [2024-06-14 14:08:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:01,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:01,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:01,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820247894] [2024-06-14 14:08:01,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820247894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:01,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:01,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:01,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736229454] [2024-06-14 14:08:01,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:01,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:01,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:01,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:01,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 282 transitions, 3708 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:01,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:01,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:01,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:02,924 INFO L124 PetriNetUnfolderBase]: 3191/5536 cut-off events. [2024-06-14 14:08:02,925 INFO L125 PetriNetUnfolderBase]: For 1062621/1062621 co-relation queries the response was YES. [2024-06-14 14:08:02,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45362 conditions, 5536 events. 3191/5536 cut-off events. For 1062621/1062621 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39528 event pairs, 1256 based on Foata normal form. 30/5566 useless extension candidates. Maximal degree in co-relation 45224. Up to 4689 conditions per place. [2024-06-14 14:08:02,995 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 255 selfloop transitions, 25 changer transitions 30/316 dead transitions. [2024-06-14 14:08:02,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 316 transitions, 4448 flow [2024-06-14 14:08:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-14 14:08:02,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020833333333333 [2024-06-14 14:08:02,996 INFO L175 Difference]: Start difference. First operand has 306 places, 282 transitions, 3708 flow. Second operand 12 states and 241 transitions. [2024-06-14 14:08:02,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 316 transitions, 4448 flow [2024-06-14 14:08:04,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 316 transitions, 4386 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:04,948 INFO L231 Difference]: Finished difference. Result has 311 places, 268 transitions, 3476 flow [2024-06-14 14:08:04,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3476, PETRI_PLACES=311, PETRI_TRANSITIONS=268} [2024-06-14 14:08:04,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-14 14:08:04,949 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 268 transitions, 3476 flow [2024-06-14 14:08:04,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:04,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:04,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:04,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:08:04,949 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)] === [2024-06-14 14:08:04,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:04,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1281518056, now seen corresponding path program 7 times [2024-06-14 14:08:04,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:04,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387051836] [2024-06-14 14:08:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:04,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:05,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:05,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:05,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387051836] [2024-06-14 14:08:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387051836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:05,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:05,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072789351] [2024-06-14 14:08:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:05,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:05,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:05,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:05,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:05,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:05,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 268 transitions, 3476 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:05,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:05,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:05,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:06,131 INFO L124 PetriNetUnfolderBase]: 2986/5158 cut-off events. [2024-06-14 14:08:06,131 INFO L125 PetriNetUnfolderBase]: For 1001950/1001950 co-relation queries the response was YES. [2024-06-14 14:08:06,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44090 conditions, 5158 events. 2986/5158 cut-off events. For 1001950/1001950 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36124 event pairs, 1249 based on Foata normal form. 8/5165 useless extension candidates. Maximal degree in co-relation 43951. Up to 4626 conditions per place. [2024-06-14 14:08:06,187 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 230 selfloop transitions, 55 changer transitions 0/291 dead transitions. [2024-06-14 14:08:06,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 291 transitions, 4125 flow [2024-06-14 14:08:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:06,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:08:06,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 14:08:06,188 INFO L175 Difference]: Start difference. First operand has 311 places, 268 transitions, 3476 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:08:06,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 291 transitions, 4125 flow [2024-06-14 14:08:07,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 291 transitions, 4024 flow, removed 13 selfloop flow, removed 15 redundant places. [2024-06-14 14:08:07,908 INFO L231 Difference]: Finished difference. Result has 292 places, 269 transitions, 3505 flow [2024-06-14 14:08:07,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3375, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3505, PETRI_PLACES=292, PETRI_TRANSITIONS=269} [2024-06-14 14:08:07,908 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-14 14:08:07,909 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 269 transitions, 3505 flow [2024-06-14 14:08:07,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:07,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:07,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:07,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:08:07,909 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)] === [2024-06-14 14:08:07,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:07,910 INFO L85 PathProgramCache]: Analyzing trace with hash 435237024, now seen corresponding path program 8 times [2024-06-14 14:08:07,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:07,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313813303] [2024-06-14 14:08:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:08,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:08,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313813303] [2024-06-14 14:08:08,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313813303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:08,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:08,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939035402] [2024-06-14 14:08:08,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:08,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:08,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:08,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:08,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:08,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 269 transitions, 3505 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:08,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:08,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:08,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:08,988 INFO L124 PetriNetUnfolderBase]: 2968/5122 cut-off events. [2024-06-14 14:08:08,989 INFO L125 PetriNetUnfolderBase]: For 971700/971700 co-relation queries the response was YES. [2024-06-14 14:08:09,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43244 conditions, 5122 events. 2968/5122 cut-off events. For 971700/971700 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 35772 event pairs, 1229 based on Foata normal form. 8/5129 useless extension candidates. Maximal degree in co-relation 43111. Up to 4600 conditions per place. [2024-06-14 14:08:09,048 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 228 selfloop transitions, 55 changer transitions 0/289 dead transitions. [2024-06-14 14:08:09,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 289 transitions, 4131 flow [2024-06-14 14:08:09,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 14:08:09,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-14 14:08:09,049 INFO L175 Difference]: Start difference. First operand has 292 places, 269 transitions, 3505 flow. Second operand 9 states and 186 transitions. [2024-06-14 14:08:09,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 289 transitions, 4131 flow [2024-06-14 14:08:10,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 289 transitions, 4018 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:10,893 INFO L231 Difference]: Finished difference. Result has 295 places, 269 transitions, 3507 flow [2024-06-14 14:08:10,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3507, PETRI_PLACES=295, PETRI_TRANSITIONS=269} [2024-06-14 14:08:10,893 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-14 14:08:10,894 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 269 transitions, 3507 flow [2024-06-14 14:08:10,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:10,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:10,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:10,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:08:10,894 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)] === [2024-06-14 14:08:10,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:10,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1627269540, now seen corresponding path program 9 times [2024-06-14 14:08:10,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:10,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293766099] [2024-06-14 14:08:10,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:10,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:11,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:11,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293766099] [2024-06-14 14:08:11,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293766099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:11,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:11,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433365569] [2024-06-14 14:08:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:11,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:11,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:11,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 269 transitions, 3507 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:11,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:11,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:11,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:12,088 INFO L124 PetriNetUnfolderBase]: 2955/5096 cut-off events. [2024-06-14 14:08:12,088 INFO L125 PetriNetUnfolderBase]: For 962898/962898 co-relation queries the response was YES. [2024-06-14 14:08:12,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42845 conditions, 5096 events. 2955/5096 cut-off events. For 962898/962898 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35254 event pairs, 1067 based on Foata normal form. 6/5098 useless extension candidates. Maximal degree in co-relation 42711. Up to 4264 conditions per place. [2024-06-14 14:08:12,140 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 252 selfloop transitions, 51 changer transitions 0/309 dead transitions. [2024-06-14 14:08:12,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 309 transitions, 4233 flow [2024-06-14 14:08:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:08:12,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-14 14:08:12,141 INFO L175 Difference]: Start difference. First operand has 295 places, 269 transitions, 3507 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:08:12,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 309 transitions, 4233 flow [2024-06-14 14:08:14,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 309 transitions, 4097 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:14,146 INFO L231 Difference]: Finished difference. Result has 295 places, 269 transitions, 3481 flow [2024-06-14 14:08:14,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3481, PETRI_PLACES=295, PETRI_TRANSITIONS=269} [2024-06-14 14:08:14,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-14 14:08:14,146 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 269 transitions, 3481 flow [2024-06-14 14:08:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:14,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:14,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:14,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:08:14,146 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)] === [2024-06-14 14:08:14,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:14,147 INFO L85 PathProgramCache]: Analyzing trace with hash 614128132, now seen corresponding path program 5 times [2024-06-14 14:08:14,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:14,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999912969] [2024-06-14 14:08:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:14,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:14,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:14,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999912969] [2024-06-14 14:08:14,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999912969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:14,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:14,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:14,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951499021] [2024-06-14 14:08:14,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:14,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:14,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:14,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:14,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:14,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 269 transitions, 3481 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:14,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:14,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:14,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:15,275 INFO L124 PetriNetUnfolderBase]: 2975/5138 cut-off events. [2024-06-14 14:08:15,275 INFO L125 PetriNetUnfolderBase]: For 984353/984353 co-relation queries the response was YES. [2024-06-14 14:08:15,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43299 conditions, 5138 events. 2975/5138 cut-off events. For 984353/984353 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 35924 event pairs, 1225 based on Foata normal form. 6/5141 useless extension candidates. Maximal degree in co-relation 43164. Up to 4577 conditions per place. [2024-06-14 14:08:15,335 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 226 selfloop transitions, 64 changer transitions 0/296 dead transitions. [2024-06-14 14:08:15,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 296 transitions, 4145 flow [2024-06-14 14:08:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 14:08:15,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-14 14:08:15,336 INFO L175 Difference]: Start difference. First operand has 295 places, 269 transitions, 3481 flow. Second operand 8 states and 177 transitions. [2024-06-14 14:08:15,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 296 transitions, 4145 flow [2024-06-14 14:08:17,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 296 transitions, 4054 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:17,011 INFO L231 Difference]: Finished difference. Result has 295 places, 270 transitions, 3540 flow [2024-06-14 14:08:17,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3390, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3540, PETRI_PLACES=295, PETRI_TRANSITIONS=270} [2024-06-14 14:08:17,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 254 predicate places. [2024-06-14 14:08:17,011 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 270 transitions, 3540 flow [2024-06-14 14:08:17,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:17,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:17,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:17,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:08:17,012 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)] === [2024-06-14 14:08:17,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1193137087, now seen corresponding path program 7 times [2024-06-14 14:08:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742359886] [2024-06-14 14:08:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:17,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:17,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:17,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742359886] [2024-06-14 14:08:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742359886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:17,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:17,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:17,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876211041] [2024-06-14 14:08:17,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:17,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:17,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:17,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:17,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:17,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:17,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 270 transitions, 3540 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:17,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:17,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:17,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:18,277 INFO L124 PetriNetUnfolderBase]: 3107/5306 cut-off events. [2024-06-14 14:08:18,277 INFO L125 PetriNetUnfolderBase]: For 1044694/1044694 co-relation queries the response was YES. [2024-06-14 14:08:18,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46164 conditions, 5306 events. 3107/5306 cut-off events. For 1044694/1044694 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36908 event pairs, 1225 based on Foata normal form. 6/5311 useless extension candidates. Maximal degree in co-relation 46030. Up to 4517 conditions per place. [2024-06-14 14:08:18,334 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 140 changer transitions 0/307 dead transitions. [2024-06-14 14:08:18,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 307 transitions, 4524 flow [2024-06-14 14:08:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:18,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:18,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 14:08:18,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-14 14:08:18,334 INFO L175 Difference]: Start difference. First operand has 295 places, 270 transitions, 3540 flow. Second operand 11 states and 237 transitions. [2024-06-14 14:08:18,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 307 transitions, 4524 flow [2024-06-14 14:08:19,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 307 transitions, 4388 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:19,996 INFO L231 Difference]: Finished difference. Result has 301 places, 274 transitions, 3822 flow [2024-06-14 14:08:19,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3822, PETRI_PLACES=301, PETRI_TRANSITIONS=274} [2024-06-14 14:08:19,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-14 14:08:19,997 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 274 transitions, 3822 flow [2024-06-14 14:08:19,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:19,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:19,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:19,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:08:19,997 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)] === [2024-06-14 14:08:19,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1661217731, now seen corresponding path program 8 times [2024-06-14 14:08:19,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:19,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119327825] [2024-06-14 14:08:19,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:20,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:20,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119327825] [2024-06-14 14:08:20,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119327825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:20,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:20,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:20,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215711993] [2024-06-14 14:08:20,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:20,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:20,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:20,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:20,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:20,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 274 transitions, 3822 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:20,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:20,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:20,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:21,133 INFO L124 PetriNetUnfolderBase]: 3135/5396 cut-off events. [2024-06-14 14:08:21,133 INFO L125 PetriNetUnfolderBase]: For 1078848/1078848 co-relation queries the response was YES. [2024-06-14 14:08:21,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47166 conditions, 5396 events. 3135/5396 cut-off events. For 1078848/1078848 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38008 event pairs, 1281 based on Foata normal form. 8/5403 useless extension candidates. Maximal degree in co-relation 47030. Up to 4767 conditions per place. [2024-06-14 14:08:21,203 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 163 selfloop transitions, 131 changer transitions 0/300 dead transitions. [2024-06-14 14:08:21,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 300 transitions, 4515 flow [2024-06-14 14:08:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:21,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 14:08:21,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 14:08:21,205 INFO L175 Difference]: Start difference. First operand has 301 places, 274 transitions, 3822 flow. Second operand 11 states and 230 transitions. [2024-06-14 14:08:21,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 300 transitions, 4515 flow [2024-06-14 14:08:22,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 300 transitions, 4306 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:22,885 INFO L231 Difference]: Finished difference. Result has 305 places, 275 transitions, 3913 flow [2024-06-14 14:08:22,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3617, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3913, PETRI_PLACES=305, PETRI_TRANSITIONS=275} [2024-06-14 14:08:22,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-14 14:08:22,885 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 275 transitions, 3913 flow [2024-06-14 14:08:22,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:22,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:22,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:22,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:08:22,886 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)] === [2024-06-14 14:08:22,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:22,886 INFO L85 PathProgramCache]: Analyzing trace with hash 702693892, now seen corresponding path program 6 times [2024-06-14 14:08:22,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:22,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904213870] [2024-06-14 14:08:22,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:22,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904213870] [2024-06-14 14:08:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904213870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770276905] [2024-06-14 14:08:23,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:23,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:23,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:23,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 275 transitions, 3913 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:23,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:23,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:23,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:24,047 INFO L124 PetriNetUnfolderBase]: 3155/5427 cut-off events. [2024-06-14 14:08:24,047 INFO L125 PetriNetUnfolderBase]: For 1093112/1093112 co-relation queries the response was YES. [2024-06-14 14:08:24,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47580 conditions, 5427 events. 3155/5427 cut-off events. For 1093112/1093112 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 38334 event pairs, 1276 based on Foata normal form. 6/5430 useless extension candidates. Maximal degree in co-relation 47442. Up to 4863 conditions per place. [2024-06-14 14:08:24,110 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 238 selfloop transitions, 58 changer transitions 0/302 dead transitions. [2024-06-14 14:08:24,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 302 transitions, 4603 flow [2024-06-14 14:08:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 14:08:24,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5361111111111111 [2024-06-14 14:08:24,111 INFO L175 Difference]: Start difference. First operand has 305 places, 275 transitions, 3913 flow. Second operand 9 states and 193 transitions. [2024-06-14 14:08:24,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 302 transitions, 4603 flow [2024-06-14 14:08:25,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 302 transitions, 4324 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:25,772 INFO L231 Difference]: Finished difference. Result has 305 places, 276 transitions, 3774 flow [2024-06-14 14:08:25,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3774, PETRI_PLACES=305, PETRI_TRANSITIONS=276} [2024-06-14 14:08:25,772 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-14 14:08:25,772 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 276 transitions, 3774 flow [2024-06-14 14:08:25,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:25,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:25,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:08:25,773 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)] === [2024-06-14 14:08:25,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1281702847, now seen corresponding path program 9 times [2024-06-14 14:08:25,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:25,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834977290] [2024-06-14 14:08:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:26,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:26,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834977290] [2024-06-14 14:08:26,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834977290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:26,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:26,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:26,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345847211] [2024-06-14 14:08:26,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:26,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:26,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:26,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:26,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:26,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:26,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 276 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:26,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:26,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:26,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:26,947 INFO L124 PetriNetUnfolderBase]: 3175/5470 cut-off events. [2024-06-14 14:08:26,947 INFO L125 PetriNetUnfolderBase]: For 1115968/1115968 co-relation queries the response was YES. [2024-06-14 14:08:26,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47826 conditions, 5470 events. 3175/5470 cut-off events. For 1115968/1115968 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 38665 event pairs, 1291 based on Foata normal form. 6/5475 useless extension candidates. Maximal degree in co-relation 47687. Up to 4801 conditions per place. [2024-06-14 14:08:27,014 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 166 selfloop transitions, 134 changer transitions 0/306 dead transitions. [2024-06-14 14:08:27,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 306 transitions, 4493 flow [2024-06-14 14:08:27,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-14 14:08:27,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 14:08:27,015 INFO L175 Difference]: Start difference. First operand has 305 places, 276 transitions, 3774 flow. Second operand 12 states and 249 transitions. [2024-06-14 14:08:27,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 306 transitions, 4493 flow [2024-06-14 14:08:29,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 306 transitions, 4367 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:29,018 INFO L231 Difference]: Finished difference. Result has 310 places, 277 transitions, 3951 flow [2024-06-14 14:08:29,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3951, PETRI_PLACES=310, PETRI_TRANSITIONS=277} [2024-06-14 14:08:29,018 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-14 14:08:29,018 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 277 transitions, 3951 flow [2024-06-14 14:08:29,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:29,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:29,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:08:29,019 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)] === [2024-06-14 14:08:29,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 524122248, now seen corresponding path program 7 times [2024-06-14 14:08:29,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:29,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758711803] [2024-06-14 14:08:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:29,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758711803] [2024-06-14 14:08:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758711803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:29,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:29,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:29,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238641834] [2024-06-14 14:08:29,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:29,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:29,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:29,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:29,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:29,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:29,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 277 transitions, 3951 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:29,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:29,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:29,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:30,120 INFO L124 PetriNetUnfolderBase]: 3195/5514 cut-off events. [2024-06-14 14:08:30,120 INFO L125 PetriNetUnfolderBase]: For 1140299/1140299 co-relation queries the response was YES. [2024-06-14 14:08:30,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48375 conditions, 5514 events. 3195/5514 cut-off events. For 1140299/1140299 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38523 event pairs, 1045 based on Foata normal form. 6/5517 useless extension candidates. Maximal degree in co-relation 48235. Up to 3929 conditions per place. [2024-06-14 14:08:30,189 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 213 selfloop transitions, 89 changer transitions 0/308 dead transitions. [2024-06-14 14:08:30,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 308 transitions, 5031 flow [2024-06-14 14:08:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:08:30,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:08:30,190 INFO L175 Difference]: Start difference. First operand has 310 places, 277 transitions, 3951 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:08:30,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 308 transitions, 5031 flow [2024-06-14 14:08:32,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 308 transitions, 4743 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-14 14:08:32,136 INFO L231 Difference]: Finished difference. Result has 307 places, 278 transitions, 3859 flow [2024-06-14 14:08:32,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3663, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3859, PETRI_PLACES=307, PETRI_TRANSITIONS=278} [2024-06-14 14:08:32,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-14 14:08:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 278 transitions, 3859 flow [2024-06-14 14:08:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:32,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:32,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:08:32,137 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)] === [2024-06-14 14:08:32,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash 609472511, now seen corresponding path program 10 times [2024-06-14 14:08:32,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:32,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940328021] [2024-06-14 14:08:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:32,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940328021] [2024-06-14 14:08:32,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940328021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:32,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:32,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006973130] [2024-06-14 14:08:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:32,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:32,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:32,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:32,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 278 transitions, 3859 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:32,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:32,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:33,422 INFO L124 PetriNetUnfolderBase]: 3643/6178 cut-off events. [2024-06-14 14:08:33,423 INFO L125 PetriNetUnfolderBase]: For 1499348/1499348 co-relation queries the response was YES. [2024-06-14 14:08:33,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59063 conditions, 6178 events. 3643/6178 cut-off events. For 1499348/1499348 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 43724 event pairs, 1232 based on Foata normal form. 6/6183 useless extension candidates. Maximal degree in co-relation 58922. Up to 4232 conditions per place. [2024-06-14 14:08:33,502 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 204 selfloop transitions, 116 changer transitions 0/326 dead transitions. [2024-06-14 14:08:33,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 326 transitions, 5203 flow [2024-06-14 14:08:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 14:08:33,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:08:33,503 INFO L175 Difference]: Start difference. First operand has 307 places, 278 transitions, 3859 flow. Second operand 9 states and 207 transitions. [2024-06-14 14:08:33,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 326 transitions, 5203 flow [2024-06-14 14:08:36,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 326 transitions, 4969 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:36,351 INFO L231 Difference]: Finished difference. Result has 314 places, 287 transitions, 4180 flow [2024-06-14 14:08:36,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3625, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4180, PETRI_PLACES=314, PETRI_TRANSITIONS=287} [2024-06-14 14:08:36,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-14 14:08:36,351 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 287 transitions, 4180 flow [2024-06-14 14:08:36,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:36,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:08:36,352 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)] === [2024-06-14 14:08:36,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash 524391018, now seen corresponding path program 8 times [2024-06-14 14:08:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:36,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415324049] [2024-06-14 14:08:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:36,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:36,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:36,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415324049] [2024-06-14 14:08:36,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415324049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:36,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:36,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238292818] [2024-06-14 14:08:36,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:36,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:36,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:36,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:36,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 287 transitions, 4180 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:36,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:36,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:37,599 INFO L124 PetriNetUnfolderBase]: 3663/6256 cut-off events. [2024-06-14 14:08:37,599 INFO L125 PetriNetUnfolderBase]: For 1535018/1535018 co-relation queries the response was YES. [2024-06-14 14:08:37,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59785 conditions, 6256 events. 3663/6256 cut-off events. For 1535018/1535018 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 45014 event pairs, 1302 based on Foata normal form. 6/6259 useless extension candidates. Maximal degree in co-relation 59641. Up to 5460 conditions per place. [2024-06-14 14:08:37,678 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 87 changer transitions 0/318 dead transitions. [2024-06-14 14:08:37,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 318 transitions, 4901 flow [2024-06-14 14:08:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 14:08:37,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-14 14:08:37,679 INFO L175 Difference]: Start difference. First operand has 314 places, 287 transitions, 4180 flow. Second operand 8 states and 181 transitions. [2024-06-14 14:08:37,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 318 transitions, 4901 flow [2024-06-14 14:08:42,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 318 transitions, 4581 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:42,104 INFO L231 Difference]: Finished difference. Result has 316 places, 288 transitions, 4047 flow [2024-06-14 14:08:42,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3860, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4047, PETRI_PLACES=316, PETRI_TRANSITIONS=288} [2024-06-14 14:08:42,105 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-14 14:08:42,105 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 288 transitions, 4047 flow [2024-06-14 14:08:42,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:42,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:42,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:08:42,105 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)] === [2024-06-14 14:08:42,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1048084213, now seen corresponding path program 11 times [2024-06-14 14:08:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:42,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236483368] [2024-06-14 14:08:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:42,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:42,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236483368] [2024-06-14 14:08:42,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236483368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:42,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:42,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:42,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802686017] [2024-06-14 14:08:42,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:42,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:42,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:42,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:42,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:42,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 288 transitions, 4047 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:42,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:42,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:43,628 INFO L124 PetriNetUnfolderBase]: 3749/6350 cut-off events. [2024-06-14 14:08:43,628 INFO L125 PetriNetUnfolderBase]: For 1618590/1618590 co-relation queries the response was YES. [2024-06-14 14:08:43,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61113 conditions, 6350 events. 3749/6350 cut-off events. For 1618590/1618590 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 45002 event pairs, 1290 based on Foata normal form. 6/6355 useless extension candidates. Maximal degree in co-relation 60970. Up to 3403 conditions per place. [2024-06-14 14:08:43,707 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 171 changer transitions 0/328 dead transitions. [2024-06-14 14:08:43,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 328 transitions, 5273 flow [2024-06-14 14:08:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:08:43,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:08:43,708 INFO L175 Difference]: Start difference. First operand has 316 places, 288 transitions, 4047 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:08:43,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 328 transitions, 5273 flow [2024-06-14 14:08:47,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 328 transitions, 5099 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:47,877 INFO L231 Difference]: Finished difference. Result has 321 places, 291 transitions, 4375 flow [2024-06-14 14:08:47,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4375, PETRI_PLACES=321, PETRI_TRANSITIONS=291} [2024-06-14 14:08:47,877 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-14 14:08:47,878 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 291 transitions, 4375 flow [2024-06-14 14:08:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:47,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:47,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:47,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:08:47,878 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)] === [2024-06-14 14:08:47,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:47,879 INFO L85 PathProgramCache]: Analyzing trace with hash 849132138, now seen corresponding path program 9 times [2024-06-14 14:08:47,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:47,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396781307] [2024-06-14 14:08:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:47,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:48,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:48,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396781307] [2024-06-14 14:08:48,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396781307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:48,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:48,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:48,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292022800] [2024-06-14 14:08:48,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:48,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:48,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:48,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:48,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 291 transitions, 4375 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:48,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:48,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:48,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:49,217 INFO L124 PetriNetUnfolderBase]: 3769/6428 cut-off events. [2024-06-14 14:08:49,217 INFO L125 PetriNetUnfolderBase]: For 1658079/1658079 co-relation queries the response was YES. [2024-06-14 14:08:49,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62509 conditions, 6428 events. 3769/6428 cut-off events. For 1658079/1658079 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 46336 event pairs, 1338 based on Foata normal form. 6/6433 useless extension candidates. Maximal degree in co-relation 62364. Up to 5554 conditions per place. [2024-06-14 14:08:49,299 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 227 selfloop transitions, 90 changer transitions 0/323 dead transitions. [2024-06-14 14:08:49,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 323 transitions, 5114 flow [2024-06-14 14:08:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 14:08:49,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-14 14:08:49,300 INFO L175 Difference]: Start difference. First operand has 321 places, 291 transitions, 4375 flow. Second operand 9 states and 196 transitions. [2024-06-14 14:08:49,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 323 transitions, 5114 flow [2024-06-14 14:08:54,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 323 transitions, 4839 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:54,231 INFO L231 Difference]: Finished difference. Result has 324 places, 292 transitions, 4295 flow [2024-06-14 14:08:54,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4295, PETRI_PLACES=324, PETRI_TRANSITIONS=292} [2024-06-14 14:08:54,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-14 14:08:54,231 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 292 transitions, 4295 flow [2024-06-14 14:08:54,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:54,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:54,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:54,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:08:54,232 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)] === [2024-06-14 14:08:54,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash 849143639, now seen corresponding path program 12 times [2024-06-14 14:08:54,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:54,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776061607] [2024-06-14 14:08:54,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:54,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:54,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776061607] [2024-06-14 14:08:54,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776061607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:54,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:54,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:54,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824274831] [2024-06-14 14:08:54,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:54,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:54,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:54,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:54,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:54,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:08:54,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 292 transitions, 4295 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:54,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:54,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:08:54,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:55,656 INFO L124 PetriNetUnfolderBase]: 3756/6396 cut-off events. [2024-06-14 14:08:55,656 INFO L125 PetriNetUnfolderBase]: For 1664807/1664807 co-relation queries the response was YES. [2024-06-14 14:08:55,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61762 conditions, 6396 events. 3756/6396 cut-off events. For 1664807/1664807 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 46008 event pairs, 1374 based on Foata normal form. 6/6402 useless extension candidates. Maximal degree in co-relation 61616. Up to 5742 conditions per place. [2024-06-14 14:08:55,739 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 281 selfloop transitions, 34 changer transitions 0/321 dead transitions. [2024-06-14 14:08:55,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 321 transitions, 5023 flow [2024-06-14 14:08:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:08:55,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-14 14:08:55,740 INFO L175 Difference]: Start difference. First operand has 324 places, 292 transitions, 4295 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:08:55,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 321 transitions, 5023 flow [2024-06-14 14:09:00,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 321 transitions, 4827 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:00,587 INFO L231 Difference]: Finished difference. Result has 325 places, 292 transitions, 4171 flow [2024-06-14 14:09:00,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4099, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4171, PETRI_PLACES=325, PETRI_TRANSITIONS=292} [2024-06-14 14:09:00,588 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-14 14:09:00,588 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 292 transitions, 4171 flow [2024-06-14 14:09:00,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:00,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:00,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:00,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:09:00,589 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)] === [2024-06-14 14:09:00,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:00,589 INFO L85 PathProgramCache]: Analyzing trace with hash 203970939, now seen corresponding path program 13 times [2024-06-14 14:09:00,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649257132] [2024-06-14 14:09:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:00,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:00,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649257132] [2024-06-14 14:09:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649257132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:00,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621206324] [2024-06-14 14:09:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:00,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:00,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:00,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 292 transitions, 4171 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:00,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:00,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:00,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:02,053 INFO L124 PetriNetUnfolderBase]: 3837/6528 cut-off events. [2024-06-14 14:09:02,053 INFO L125 PetriNetUnfolderBase]: For 1737598/1737598 co-relation queries the response was YES. [2024-06-14 14:09:02,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63328 conditions, 6528 events. 3837/6528 cut-off events. For 1737598/1737598 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 47064 event pairs, 1544 based on Foata normal form. 8/6532 useless extension candidates. Maximal degree in co-relation 63181. Up to 5935 conditions per place. [2024-06-14 14:09:02,139 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 275 selfloop transitions, 38 changer transitions 0/319 dead transitions. [2024-06-14 14:09:02,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 319 transitions, 5155 flow [2024-06-14 14:09:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 14:09:02,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-14 14:09:02,140 INFO L175 Difference]: Start difference. First operand has 325 places, 292 transitions, 4171 flow. Second operand 8 states and 175 transitions. [2024-06-14 14:09:02,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 319 transitions, 5155 flow [2024-06-14 14:09:07,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 319 transitions, 5024 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:07,290 INFO L231 Difference]: Finished difference. Result has 326 places, 295 transitions, 4217 flow [2024-06-14 14:09:07,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4042, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4217, PETRI_PLACES=326, PETRI_TRANSITIONS=295} [2024-06-14 14:09:07,291 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-14 14:09:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 295 transitions, 4217 flow [2024-06-14 14:09:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:07,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:07,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:07,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:09:07,291 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:07,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash -382656235, now seen corresponding path program 14 times [2024-06-14 14:09:07,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:07,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544816546] [2024-06-14 14:09:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:07,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:07,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:07,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544816546] [2024-06-14 14:09:07,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544816546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:07,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:07,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:07,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89239081] [2024-06-14 14:09:07,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:07,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:07,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:07,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:07,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:07,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:07,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 295 transitions, 4217 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:07,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:07,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:07,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:08,638 INFO L124 PetriNetUnfolderBase]: 3819/6506 cut-off events. [2024-06-14 14:09:08,638 INFO L125 PetriNetUnfolderBase]: For 1732313/1732313 co-relation queries the response was YES. [2024-06-14 14:09:08,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62689 conditions, 6506 events. 3819/6506 cut-off events. For 1732313/1732313 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 46986 event pairs, 1568 based on Foata normal form. 8/6512 useless extension candidates. Maximal degree in co-relation 62540. Up to 6017 conditions per place. [2024-06-14 14:09:08,916 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 275 selfloop transitions, 32 changer transitions 0/313 dead transitions. [2024-06-14 14:09:08,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 313 transitions, 4889 flow [2024-06-14 14:09:08,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 14:09:08,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-06-14 14:09:08,917 INFO L175 Difference]: Start difference. First operand has 326 places, 295 transitions, 4217 flow. Second operand 7 states and 153 transitions. [2024-06-14 14:09:08,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 313 transitions, 4889 flow [2024-06-14 14:09:13,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 313 transitions, 4785 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:13,650 INFO L231 Difference]: Finished difference. Result has 327 places, 295 transitions, 4185 flow [2024-06-14 14:09:13,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4185, PETRI_PLACES=327, PETRI_TRANSITIONS=295} [2024-06-14 14:09:13,651 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 286 predicate places. [2024-06-14 14:09:13,651 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 295 transitions, 4185 flow [2024-06-14 14:09:13,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:13,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:13,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:09:13,651 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:13,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:13,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1644582917, now seen corresponding path program 15 times [2024-06-14 14:09:13,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:13,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561934808] [2024-06-14 14:09:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:13,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:13,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:13,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561934808] [2024-06-14 14:09:13,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561934808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:13,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:13,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:13,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702705969] [2024-06-14 14:09:13,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:13,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:13,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:13,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:13,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:13,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:13,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 295 transitions, 4185 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:13,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:13,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:15,020 INFO L124 PetriNetUnfolderBase]: 3839/6538 cut-off events. [2024-06-14 14:09:15,020 INFO L125 PetriNetUnfolderBase]: For 1720985/1720985 co-relation queries the response was YES. [2024-06-14 14:09:15,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62617 conditions, 6538 events. 3839/6538 cut-off events. For 1720985/1720985 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 47237 event pairs, 1540 based on Foata normal form. 6/6542 useless extension candidates. Maximal degree in co-relation 62468. Up to 5947 conditions per place. [2024-06-14 14:09:15,107 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 282 selfloop transitions, 30 changer transitions 0/318 dead transitions. [2024-06-14 14:09:15,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 318 transitions, 4919 flow [2024-06-14 14:09:15,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 14:09:15,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 14:09:15,108 INFO L175 Difference]: Start difference. First operand has 327 places, 295 transitions, 4185 flow. Second operand 7 states and 155 transitions. [2024-06-14 14:09:15,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 318 transitions, 4919 flow [2024-06-14 14:09:20,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 318 transitions, 4856 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:20,144 INFO L231 Difference]: Finished difference. Result has 328 places, 296 transitions, 4221 flow [2024-06-14 14:09:20,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4221, PETRI_PLACES=328, PETRI_TRANSITIONS=296} [2024-06-14 14:09:20,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 287 predicate places. [2024-06-14 14:09:20,145 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 296 transitions, 4221 flow [2024-06-14 14:09:20,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:20,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:20,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:20,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:09:20,145 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:20,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash -174545571, now seen corresponding path program 16 times [2024-06-14 14:09:20,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946469993] [2024-06-14 14:09:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:20,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:20,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946469993] [2024-06-14 14:09:20,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946469993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:20,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:20,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:20,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257464915] [2024-06-14 14:09:20,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:20,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:20,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:20,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:20,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:20,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:20,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 296 transitions, 4221 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:20,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:20,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:20,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:21,485 INFO L124 PetriNetUnfolderBase]: 3854/6567 cut-off events. [2024-06-14 14:09:21,485 INFO L125 PetriNetUnfolderBase]: For 1723290/1723290 co-relation queries the response was YES. [2024-06-14 14:09:21,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62735 conditions, 6567 events. 3854/6567 cut-off events. For 1723290/1723290 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 47436 event pairs, 1602 based on Foata normal form. 8/6574 useless extension candidates. Maximal degree in co-relation 62586. Up to 5904 conditions per place. [2024-06-14 14:09:21,585 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 180 selfloop transitions, 134 changer transitions 0/320 dead transitions. [2024-06-14 14:09:21,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 320 transitions, 4953 flow [2024-06-14 14:09:21,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:09:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:09:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-14 14:09:21,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50625 [2024-06-14 14:09:21,586 INFO L175 Difference]: Start difference. First operand has 328 places, 296 transitions, 4221 flow. Second operand 12 states and 243 transitions. [2024-06-14 14:09:21,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 320 transitions, 4953 flow [2024-06-14 14:09:26,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 320 transitions, 4880 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:26,570 INFO L231 Difference]: Finished difference. Result has 335 places, 297 transitions, 4459 flow [2024-06-14 14:09:26,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4459, PETRI_PLACES=335, PETRI_TRANSITIONS=297} [2024-06-14 14:09:26,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-14 14:09:26,571 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 297 transitions, 4459 flow [2024-06-14 14:09:26,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:26,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:26,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:26,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:09:26,571 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:26,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2062715605, now seen corresponding path program 17 times [2024-06-14 14:09:26,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:26,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453407359] [2024-06-14 14:09:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:26,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:26,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:26,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453407359] [2024-06-14 14:09:26,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453407359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:26,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:26,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:26,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672681376] [2024-06-14 14:09:26,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:26,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:26,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:26,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:26,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:26,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:26,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 297 transitions, 4459 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:26,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:26,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:26,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:28,168 INFO L124 PetriNetUnfolderBase]: 3874/6601 cut-off events. [2024-06-14 14:09:28,168 INFO L125 PetriNetUnfolderBase]: For 1715989/1715989 co-relation queries the response was YES. [2024-06-14 14:09:28,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63174 conditions, 6601 events. 3874/6601 cut-off events. For 1715989/1715989 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 47806 event pairs, 1600 based on Foata normal form. 6/6606 useless extension candidates. Maximal degree in co-relation 63024. Up to 5874 conditions per place. [2024-06-14 14:09:28,379 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 180 selfloop transitions, 138 changer transitions 0/324 dead transitions. [2024-06-14 14:09:28,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 324 transitions, 5215 flow [2024-06-14 14:09:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:09:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:09:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-14 14:09:28,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-06-14 14:09:28,380 INFO L175 Difference]: Start difference. First operand has 335 places, 297 transitions, 4459 flow. Second operand 12 states and 245 transitions. [2024-06-14 14:09:28,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 324 transitions, 5215 flow [2024-06-14 14:09:32,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 324 transitions, 4924 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:32,703 INFO L231 Difference]: Finished difference. Result has 337 places, 298 transitions, 4488 flow [2024-06-14 14:09:32,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4488, PETRI_PLACES=337, PETRI_TRANSITIONS=298} [2024-06-14 14:09:32,704 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-14 14:09:32,704 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 298 transitions, 4488 flow [2024-06-14 14:09:32,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:32,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:32,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:32,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:09:32,704 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:32,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2062715264, now seen corresponding path program 10 times [2024-06-14 14:09:32,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:32,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948083754] [2024-06-14 14:09:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:32,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:32,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948083754] [2024-06-14 14:09:32,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948083754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:32,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:32,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:32,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614206884] [2024-06-14 14:09:32,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:32,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:32,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:32,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:32,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:32,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 298 transitions, 4488 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:32,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:32,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:32,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:34,360 INFO L124 PetriNetUnfolderBase]: 3861/6597 cut-off events. [2024-06-14 14:09:34,360 INFO L125 PetriNetUnfolderBase]: For 1717731/1717731 co-relation queries the response was YES. [2024-06-14 14:09:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62694 conditions, 6597 events. 3861/6597 cut-off events. For 1717731/1717731 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 47938 event pairs, 1600 based on Foata normal form. 6/6600 useless extension candidates. Maximal degree in co-relation 62543. Up to 5985 conditions per place. [2024-06-14 14:09:34,442 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 258 selfloop transitions, 58 changer transitions 0/322 dead transitions. [2024-06-14 14:09:34,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 322 transitions, 5194 flow [2024-06-14 14:09:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 14:09:34,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-14 14:09:34,443 INFO L175 Difference]: Start difference. First operand has 337 places, 298 transitions, 4488 flow. Second operand 10 states and 205 transitions. [2024-06-14 14:09:34,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 322 transitions, 5194 flow [2024-06-14 14:09:38,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 322 transitions, 4890 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:38,968 INFO L231 Difference]: Finished difference. Result has 337 places, 298 transitions, 4304 flow [2024-06-14 14:09:38,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4304, PETRI_PLACES=337, PETRI_TRANSITIONS=298} [2024-06-14 14:09:38,968 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-14 14:09:38,968 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 298 transitions, 4304 flow [2024-06-14 14:09:38,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:38,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:38,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:38,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:09:38,969 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:38,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2070989815, now seen corresponding path program 18 times [2024-06-14 14:09:38,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:38,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891543584] [2024-06-14 14:09:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:38,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:39,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:39,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891543584] [2024-06-14 14:09:39,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891543584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:39,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:39,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:39,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321836076] [2024-06-14 14:09:39,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:39,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:39,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:39,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:39,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 298 transitions, 4304 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:39,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:39,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:39,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:40,744 INFO L124 PetriNetUnfolderBase]: 3881/6612 cut-off events. [2024-06-14 14:09:40,745 INFO L125 PetriNetUnfolderBase]: For 1749985/1749985 co-relation queries the response was YES. [2024-06-14 14:09:40,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62892 conditions, 6612 events. 3881/6612 cut-off events. For 1749985/1749985 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 47858 event pairs, 1561 based on Foata normal form. 6/6617 useless extension candidates. Maximal degree in co-relation 62740. Up to 5593 conditions per place. [2024-06-14 14:09:40,928 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 173 selfloop transitions, 149 changer transitions 0/328 dead transitions. [2024-06-14 14:09:40,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 328 transitions, 5080 flow [2024-06-14 14:09:40,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-14 14:09:40,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-14 14:09:40,929 INFO L175 Difference]: Start difference. First operand has 337 places, 298 transitions, 4304 flow. Second operand 11 states and 232 transitions. [2024-06-14 14:09:40,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 328 transitions, 5080 flow [2024-06-14 14:09:45,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 328 transitions, 4921 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:45,831 INFO L231 Difference]: Finished difference. Result has 338 places, 299 transitions, 4477 flow [2024-06-14 14:09:45,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4477, PETRI_PLACES=338, PETRI_TRANSITIONS=299} [2024-06-14 14:09:45,831 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-14 14:09:45,831 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 299 transitions, 4477 flow [2024-06-14 14:09:45,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:45,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:45,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:45,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:09:45,832 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:45,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash -517527036, now seen corresponding path program 11 times [2024-06-14 14:09:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395129185] [2024-06-14 14:09:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395129185] [2024-06-14 14:09:46,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395129185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:46,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:46,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:46,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727262872] [2024-06-14 14:09:46,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:46,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:46,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:46,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:46,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:46,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 299 transitions, 4477 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:46,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:46,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:46,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:47,524 INFO L124 PetriNetUnfolderBase]: 3868/6594 cut-off events. [2024-06-14 14:09:47,524 INFO L125 PetriNetUnfolderBase]: For 1754061/1754061 co-relation queries the response was YES. [2024-06-14 14:09:47,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62675 conditions, 6594 events. 3868/6594 cut-off events. For 1754061/1754061 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 47783 event pairs, 1579 based on Foata normal form. 6/6589 useless extension candidates. Maximal degree in co-relation 62524. Up to 5836 conditions per place. [2024-06-14 14:09:47,621 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 250 selfloop transitions, 67 changer transitions 0/323 dead transitions. [2024-06-14 14:09:47,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 323 transitions, 5185 flow [2024-06-14 14:09:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 14:09:47,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-14 14:09:47,622 INFO L175 Difference]: Start difference. First operand has 338 places, 299 transitions, 4477 flow. Second operand 9 states and 189 transitions. [2024-06-14 14:09:47,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 323 transitions, 5185 flow [2024-06-14 14:09:52,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 323 transitions, 4869 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:52,422 INFO L231 Difference]: Finished difference. Result has 338 places, 299 transitions, 4299 flow [2024-06-14 14:09:52,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4299, PETRI_PLACES=338, PETRI_TRANSITIONS=299} [2024-06-14 14:09:52,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-14 14:09:52,423 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 299 transitions, 4299 flow [2024-06-14 14:09:52,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:52,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:52,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:52,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:09:52,423 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)] === [2024-06-14 14:09:52,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:52,423 INFO L85 PathProgramCache]: Analyzing trace with hash 548965721, now seen corresponding path program 19 times [2024-06-14 14:09:52,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:52,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535998126] [2024-06-14 14:09:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:52,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:52,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:52,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535998126] [2024-06-14 14:09:52,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535998126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:52,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:52,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600013997] [2024-06-14 14:09:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:52,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:09:52,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 299 transitions, 4299 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:52,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:52,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:09:52,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:54,138 INFO L124 PetriNetUnfolderBase]: 3825/6527 cut-off events. [2024-06-14 14:09:54,138 INFO L125 PetriNetUnfolderBase]: For 1752647/1752647 co-relation queries the response was YES. [2024-06-14 14:09:54,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60608 conditions, 6527 events. 3825/6527 cut-off events. For 1752647/1752647 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 47227 event pairs, 1352 based on Foata normal form. 16/6543 useless extension candidates. Maximal degree in co-relation 60456. Up to 5736 conditions per place. [2024-06-14 14:09:54,220 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 278 selfloop transitions, 36 changer transitions 11/331 dead transitions. [2024-06-14 14:09:54,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 331 transitions, 5263 flow [2024-06-14 14:09:54,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:54,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:09:54,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:09:54,221 INFO L175 Difference]: Start difference. First operand has 338 places, 299 transitions, 4299 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:09:54,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 331 transitions, 5263 flow [2024-06-14 14:09:59,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 331 transitions, 5125 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:59,991 INFO L231 Difference]: Finished difference. Result has 338 places, 291 transitions, 4077 flow [2024-06-14 14:09:59,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4077, PETRI_PLACES=338, PETRI_TRANSITIONS=291} [2024-06-14 14:09:59,992 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-14 14:09:59,992 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 291 transitions, 4077 flow [2024-06-14 14:09:59,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:59,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:59,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:59,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:09:59,992 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)] === [2024-06-14 14:09:59,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1895696503, now seen corresponding path program 20 times [2024-06-14 14:09:59,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:59,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345181510] [2024-06-14 14:09:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:59,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:00,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:00,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345181510] [2024-06-14 14:10:00,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345181510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:00,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:00,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:00,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054928401] [2024-06-14 14:10:00,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:00,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:00,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:00,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:00,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 291 transitions, 4077 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:00,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:00,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:00,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:01,603 INFO L124 PetriNetUnfolderBase]: 3616/6208 cut-off events. [2024-06-14 14:10:01,603 INFO L125 PetriNetUnfolderBase]: For 1699153/1699153 co-relation queries the response was YES. [2024-06-14 14:10:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55550 conditions, 6208 events. 3616/6208 cut-off events. For 1699153/1699153 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 44804 event pairs, 1456 based on Foata normal form. 34/6240 useless extension candidates. Maximal degree in co-relation 55397. Up to 5463 conditions per place. [2024-06-14 14:10:01,680 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 266 selfloop transitions, 43 changer transitions 8/323 dead transitions. [2024-06-14 14:10:01,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 323 transitions, 4811 flow [2024-06-14 14:10:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:10:01,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-14 14:10:01,681 INFO L175 Difference]: Start difference. First operand has 338 places, 291 transitions, 4077 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:10:01,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 323 transitions, 4811 flow [2024-06-14 14:10:05,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 323 transitions, 4673 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:05,616 INFO L231 Difference]: Finished difference. Result has 338 places, 285 transitions, 3930 flow [2024-06-14 14:10:05,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3939, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3930, PETRI_PLACES=338, PETRI_TRANSITIONS=285} [2024-06-14 14:10:05,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-14 14:10:05,617 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 285 transitions, 3930 flow [2024-06-14 14:10:05,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:05,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:05,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:05,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:10:05,618 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)] === [2024-06-14 14:10:05,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:05,618 INFO L85 PathProgramCache]: Analyzing trace with hash 748658167, now seen corresponding path program 21 times [2024-06-14 14:10:05,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:05,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841601936] [2024-06-14 14:10:05,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:05,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:05,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841601936] [2024-06-14 14:10:05,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841601936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:05,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374142793] [2024-06-14 14:10:05,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:05,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:05,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:05,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:05,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 285 transitions, 3930 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:05,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:05,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:05,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:07,128 INFO L124 PetriNetUnfolderBase]: 3482/5983 cut-off events. [2024-06-14 14:10:07,128 INFO L125 PetriNetUnfolderBase]: For 1510618/1510623 co-relation queries the response was YES. [2024-06-14 14:10:07,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53422 conditions, 5983 events. 3482/5983 cut-off events. For 1510618/1510623 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 42802 event pairs, 1421 based on Foata normal form. 13/5996 useless extension candidates. Maximal degree in co-relation 53270. Up to 5410 conditions per place. [2024-06-14 14:10:07,202 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 55 changer transitions 10/314 dead transitions. [2024-06-14 14:10:07,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 314 transitions, 4632 flow [2024-06-14 14:10:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 14:10:07,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-14 14:10:07,203 INFO L175 Difference]: Start difference. First operand has 338 places, 285 transitions, 3930 flow. Second operand 9 states and 197 transitions. [2024-06-14 14:10:07,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 314 transitions, 4632 flow [2024-06-14 14:10:11,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 314 transitions, 4446 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 14:10:11,206 INFO L231 Difference]: Finished difference. Result has 335 places, 281 transitions, 3774 flow [2024-06-14 14:10:11,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3774, PETRI_PLACES=335, PETRI_TRANSITIONS=281} [2024-06-14 14:10:11,207 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-14 14:10:11,207 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 281 transitions, 3774 flow [2024-06-14 14:10:11,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:11,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:11,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:10:11,207 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:11,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1203160969, now seen corresponding path program 22 times [2024-06-14 14:10:11,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:11,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69127041] [2024-06-14 14:10:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:11,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:11,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:11,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69127041] [2024-06-14 14:10:11,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69127041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:11,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534008317] [2024-06-14 14:10:11,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:11,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:11,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:11,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:11,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:11,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 281 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:11,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:11,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:12,821 INFO L124 PetriNetUnfolderBase]: 3406/5857 cut-off events. [2024-06-14 14:10:12,821 INFO L125 PetriNetUnfolderBase]: For 1437494/1437494 co-relation queries the response was YES. [2024-06-14 14:10:12,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50570 conditions, 5857 events. 3406/5857 cut-off events. For 1437494/1437494 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 41733 event pairs, 1384 based on Foata normal form. 16/5871 useless extension candidates. Maximal degree in co-relation 50419. Up to 5273 conditions per place. [2024-06-14 14:10:12,893 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 261 selfloop transitions, 36 changer transitions 12/315 dead transitions. [2024-06-14 14:10:12,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 315 transitions, 4492 flow [2024-06-14 14:10:12,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 14:10:12,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-14 14:10:12,894 INFO L175 Difference]: Start difference. First operand has 335 places, 281 transitions, 3774 flow. Second operand 8 states and 187 transitions. [2024-06-14 14:10:12,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 315 transitions, 4492 flow [2024-06-14 14:10:16,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 315 transitions, 4350 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:16,208 INFO L231 Difference]: Finished difference. Result has 332 places, 272 transitions, 3559 flow [2024-06-14 14:10:16,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3632, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3559, PETRI_PLACES=332, PETRI_TRANSITIONS=272} [2024-06-14 14:10:16,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-14 14:10:16,208 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 272 transitions, 3559 flow [2024-06-14 14:10:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:16,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:16,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:16,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:10:16,208 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:16,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1437688643, now seen corresponding path program 23 times [2024-06-14 14:10:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779373225] [2024-06-14 14:10:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:16,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:16,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779373225] [2024-06-14 14:10:16,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779373225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:16,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:16,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:16,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322442159] [2024-06-14 14:10:16,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:16,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:16,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:16,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:16,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:16,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:16,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 272 transitions, 3559 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:16,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:16,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:16,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:17,611 INFO L124 PetriNetUnfolderBase]: 3305/5708 cut-off events. [2024-06-14 14:10:17,611 INFO L125 PetriNetUnfolderBase]: For 1322269/1322274 co-relation queries the response was YES. [2024-06-14 14:10:17,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48553 conditions, 5708 events. 3305/5708 cut-off events. For 1322269/1322274 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 40673 event pairs, 1381 based on Foata normal form. 11/5719 useless extension candidates. Maximal degree in co-relation 48403. Up to 5134 conditions per place. [2024-06-14 14:10:17,677 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 244 selfloop transitions, 54 changer transitions 0/304 dead transitions. [2024-06-14 14:10:17,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 304 transitions, 4241 flow [2024-06-14 14:10:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:17,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 14:10:17,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-14 14:10:17,677 INFO L175 Difference]: Start difference. First operand has 332 places, 272 transitions, 3559 flow. Second operand 9 states and 199 transitions. [2024-06-14 14:10:17,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 304 transitions, 4241 flow [2024-06-14 14:10:21,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 304 transitions, 4029 flow, removed 11 selfloop flow, removed 15 redundant places. [2024-06-14 14:10:21,102 INFO L231 Difference]: Finished difference. Result has 326 places, 272 transitions, 3459 flow [2024-06-14 14:10:21,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3347, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3459, PETRI_PLACES=326, PETRI_TRANSITIONS=272} [2024-06-14 14:10:21,103 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-14 14:10:21,103 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 272 transitions, 3459 flow [2024-06-14 14:10:21,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:21,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:21,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:21,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:10:21,103 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:21,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1945052121, now seen corresponding path program 24 times [2024-06-14 14:10:21,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:21,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93366372] [2024-06-14 14:10:21,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:21,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:21,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:21,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93366372] [2024-06-14 14:10:21,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93366372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:21,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:21,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:21,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801278954] [2024-06-14 14:10:21,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:21,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:21,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:21,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:21,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 272 transitions, 3459 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:21,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:21,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:21,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:22,503 INFO L124 PetriNetUnfolderBase]: 3236/5607 cut-off events. [2024-06-14 14:10:22,504 INFO L125 PetriNetUnfolderBase]: For 1290129/1290129 co-relation queries the response was YES. [2024-06-14 14:10:22,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44493 conditions, 5607 events. 3236/5607 cut-off events. For 1290129/1290129 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 39988 event pairs, 1323 based on Foata normal form. 34/5641 useless extension candidates. Maximal degree in co-relation 44344. Up to 4913 conditions per place. [2024-06-14 14:10:22,569 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 241 selfloop transitions, 47 changer transitions 15/309 dead transitions. [2024-06-14 14:10:22,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 309 transitions, 4175 flow [2024-06-14 14:10:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:10:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:10:22,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-14 14:10:22,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-14 14:10:22,570 INFO L175 Difference]: Start difference. First operand has 326 places, 272 transitions, 3459 flow. Second operand 12 states and 249 transitions. [2024-06-14 14:10:22,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 309 transitions, 4175 flow [2024-06-14 14:10:25,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 309 transitions, 4032 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:25,454 INFO L231 Difference]: Finished difference. Result has 330 places, 265 transitions, 3315 flow [2024-06-14 14:10:25,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3315, PETRI_PLACES=330, PETRI_TRANSITIONS=265} [2024-06-14 14:10:25,454 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-14 14:10:25,454 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 265 transitions, 3315 flow [2024-06-14 14:10:25,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:25,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:25,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:25,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:10:25,455 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:25,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:25,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1134730027, now seen corresponding path program 25 times [2024-06-14 14:10:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:25,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647676548] [2024-06-14 14:10:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:25,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:25,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:25,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647676548] [2024-06-14 14:10:25,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647676548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:25,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:25,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:25,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238431807] [2024-06-14 14:10:25,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:25,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:25,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:25,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 265 transitions, 3315 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:25,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:25,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:25,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:26,963 INFO L124 PetriNetUnfolderBase]: 3042/5283 cut-off events. [2024-06-14 14:10:26,963 INFO L125 PetriNetUnfolderBase]: For 1130029/1130029 co-relation queries the response was YES. [2024-06-14 14:10:27,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39687 conditions, 5283 events. 3042/5283 cut-off events. For 1130029/1130029 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37144 event pairs, 1219 based on Foata normal form. 34/5317 useless extension candidates. Maximal degree in co-relation 39537. Up to 4615 conditions per place. [2024-06-14 14:10:27,027 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 242 selfloop transitions, 43 changer transitions 13/304 dead transitions. [2024-06-14 14:10:27,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 304 transitions, 4027 flow [2024-06-14 14:10:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 14:10:27,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-06-14 14:10:27,028 INFO L175 Difference]: Start difference. First operand has 330 places, 265 transitions, 3315 flow. Second operand 11 states and 235 transitions. [2024-06-14 14:10:27,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 304 transitions, 4027 flow [2024-06-14 14:10:30,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 304 transitions, 3868 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 14:10:30,187 INFO L231 Difference]: Finished difference. Result has 326 places, 260 transitions, 3163 flow [2024-06-14 14:10:30,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3156, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3163, PETRI_PLACES=326, PETRI_TRANSITIONS=260} [2024-06-14 14:10:30,187 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-14 14:10:30,187 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 260 transitions, 3163 flow [2024-06-14 14:10:30,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:30,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:30,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:10:30,188 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:30,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:30,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1745602461, now seen corresponding path program 26 times [2024-06-14 14:10:30,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:30,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77997185] [2024-06-14 14:10:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:30,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:30,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:30,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:30,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77997185] [2024-06-14 14:10:30,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77997185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:30,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:30,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:30,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128877052] [2024-06-14 14:10:30,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:30,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:30,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:30,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:30,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:30,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:30,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 260 transitions, 3163 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:30,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:30,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:30,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:31,530 INFO L124 PetriNetUnfolderBase]: 2961/5185 cut-off events. [2024-06-14 14:10:31,531 INFO L125 PetriNetUnfolderBase]: For 1052700/1052700 co-relation queries the response was YES. [2024-06-14 14:10:31,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37848 conditions, 5185 events. 2961/5185 cut-off events. For 1052700/1052700 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36680 event pairs, 1167 based on Foata normal form. 30/5215 useless extension candidates. Maximal degree in co-relation 37700. Up to 4422 conditions per place. [2024-06-14 14:10:31,589 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 243 selfloop transitions, 49 changer transitions 8/306 dead transitions. [2024-06-14 14:10:31,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 306 transitions, 3909 flow [2024-06-14 14:10:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 14:10:31,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-14 14:10:31,590 INFO L175 Difference]: Start difference. First operand has 326 places, 260 transitions, 3163 flow. Second operand 11 states and 241 transitions. [2024-06-14 14:10:31,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 306 transitions, 3909 flow [2024-06-14 14:10:34,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 306 transitions, 3803 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 14:10:34,716 INFO L231 Difference]: Finished difference. Result has 323 places, 258 transitions, 3126 flow [2024-06-14 14:10:34,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3057, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3126, PETRI_PLACES=323, PETRI_TRANSITIONS=258} [2024-06-14 14:10:34,716 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 282 predicate places. [2024-06-14 14:10:34,716 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 258 transitions, 3126 flow [2024-06-14 14:10:34,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:34,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:34,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:34,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:10:34,717 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:34,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:34,717 INFO L85 PathProgramCache]: Analyzing trace with hash 406476701, now seen corresponding path program 27 times [2024-06-14 14:10:34,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:34,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444024037] [2024-06-14 14:10:34,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:34,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:34,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:34,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444024037] [2024-06-14 14:10:34,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444024037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:34,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:34,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:34,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680791520] [2024-06-14 14:10:34,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:34,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:34,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:34,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:35,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:35,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 258 transitions, 3126 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:35,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:35,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:35,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:35,837 INFO L124 PetriNetUnfolderBase]: 2880/5041 cut-off events. [2024-06-14 14:10:35,837 INFO L125 PetriNetUnfolderBase]: For 910096/910099 co-relation queries the response was YES. [2024-06-14 14:10:35,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37245 conditions, 5041 events. 2880/5041 cut-off events. For 910096/910099 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35322 event pairs, 1040 based on Foata normal form. 9/5050 useless extension candidates. Maximal degree in co-relation 37099. Up to 4258 conditions per place. [2024-06-14 14:10:35,899 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 235 selfloop transitions, 56 changer transitions 0/297 dead transitions. [2024-06-14 14:10:35,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 297 transitions, 4054 flow [2024-06-14 14:10:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:10:35,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-14 14:10:35,899 INFO L175 Difference]: Start difference. First operand has 323 places, 258 transitions, 3126 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:10:35,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 297 transitions, 4054 flow [2024-06-14 14:10:39,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 297 transitions, 3756 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-06-14 14:10:39,258 INFO L231 Difference]: Finished difference. Result has 318 places, 259 transitions, 2976 flow [2024-06-14 14:10:39,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2976, PETRI_PLACES=318, PETRI_TRANSITIONS=259} [2024-06-14 14:10:39,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-14 14:10:39,259 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 259 transitions, 2976 flow [2024-06-14 14:10:39,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:39,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:39,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:39,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:10:39,259 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:39,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:39,259 INFO L85 PathProgramCache]: Analyzing trace with hash 984696817, now seen corresponding path program 28 times [2024-06-14 14:10:39,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:39,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704707192] [2024-06-14 14:10:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:39,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:39,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:39,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704707192] [2024-06-14 14:10:39,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704707192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:39,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:39,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:39,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567517508] [2024-06-14 14:10:39,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:39,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:39,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:39,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:39,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:39,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 259 transitions, 2976 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:39,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:39,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:39,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:40,608 INFO L124 PetriNetUnfolderBase]: 2740/4810 cut-off events. [2024-06-14 14:10:40,608 INFO L125 PetriNetUnfolderBase]: For 742141/742141 co-relation queries the response was YES. [2024-06-14 14:10:40,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32792 conditions, 4810 events. 2740/4810 cut-off events. For 742141/742141 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33467 event pairs, 1013 based on Foata normal form. 6/4816 useless extension candidates. Maximal degree in co-relation 32648. Up to 4312 conditions per place. [2024-06-14 14:10:40,663 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 259 selfloop transitions, 18 changer transitions 0/283 dead transitions. [2024-06-14 14:10:40,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 283 transitions, 3602 flow [2024-06-14 14:10:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:40,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 14:10:40,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:10:40,664 INFO L175 Difference]: Start difference. First operand has 318 places, 259 transitions, 2976 flow. Second operand 7 states and 152 transitions. [2024-06-14 14:10:40,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 283 transitions, 3602 flow [2024-06-14 14:10:43,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 283 transitions, 3383 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:43,117 INFO L231 Difference]: Finished difference. Result has 317 places, 259 transitions, 2797 flow [2024-06-14 14:10:43,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2757, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2797, PETRI_PLACES=317, PETRI_TRANSITIONS=259} [2024-06-14 14:10:43,117 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-14 14:10:43,117 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 259 transitions, 2797 flow [2024-06-14 14:10:43,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:43,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:43,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:43,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:10:43,118 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:43,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1903321015, now seen corresponding path program 2 times [2024-06-14 14:10:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:43,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753125495] [2024-06-14 14:10:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:43,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:43,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753125495] [2024-06-14 14:10:43,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753125495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:43,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:43,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:43,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792422057] [2024-06-14 14:10:43,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:43,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:43,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:43,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:43,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 259 transitions, 2797 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:43,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:43,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:43,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:44,252 INFO L124 PetriNetUnfolderBase]: 2666/4666 cut-off events. [2024-06-14 14:10:44,252 INFO L125 PetriNetUnfolderBase]: For 722583/722583 co-relation queries the response was YES. [2024-06-14 14:10:44,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28914 conditions, 4666 events. 2666/4666 cut-off events. For 722583/722583 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 32017 event pairs, 847 based on Foata normal form. 30/4692 useless extension candidates. Maximal degree in co-relation 28769. Up to 3594 conditions per place. [2024-06-14 14:10:44,309 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 240 selfloop transitions, 35 changer transitions 16/297 dead transitions. [2024-06-14 14:10:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 297 transitions, 3513 flow [2024-06-14 14:10:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:44,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:44,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:10:44,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 14:10:44,309 INFO L175 Difference]: Start difference. First operand has 317 places, 259 transitions, 2797 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:10:44,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 297 transitions, 3513 flow [2024-06-14 14:10:47,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 297 transitions, 3402 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:47,226 INFO L231 Difference]: Finished difference. Result has 316 places, 249 transitions, 2659 flow [2024-06-14 14:10:47,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2686, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=316, PETRI_TRANSITIONS=249} [2024-06-14 14:10:47,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-14 14:10:47,227 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 249 transitions, 2659 flow [2024-06-14 14:10:47,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:47,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:47,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:47,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:10:47,227 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)] === [2024-06-14 14:10:47,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:47,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1836646327, now seen corresponding path program 3 times [2024-06-14 14:10:47,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:47,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764342927] [2024-06-14 14:10:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:47,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:47,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764342927] [2024-06-14 14:10:47,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764342927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:47,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:47,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:47,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715333060] [2024-06-14 14:10:47,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:47,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:47,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:47,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:47,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:47,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:47,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 249 transitions, 2659 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:47,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:47,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:47,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:48,318 INFO L124 PetriNetUnfolderBase]: 2486/4343 cut-off events. [2024-06-14 14:10:48,318 INFO L125 PetriNetUnfolderBase]: For 607467/607467 co-relation queries the response was YES. [2024-06-14 14:10:48,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27770 conditions, 4343 events. 2486/4343 cut-off events. For 607467/607467 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29135 event pairs, 582 based on Foata normal form. 6/4349 useless extension candidates. Maximal degree in co-relation 27626. Up to 3053 conditions per place. [2024-06-14 14:10:48,370 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 231 selfloop transitions, 44 changer transitions 7/288 dead transitions. [2024-06-14 14:10:48,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 288 transitions, 3578 flow [2024-06-14 14:10:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:48,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:10:48,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-14 14:10:48,371 INFO L175 Difference]: Start difference. First operand has 316 places, 249 transitions, 2659 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:10:48,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 288 transitions, 3578 flow [2024-06-14 14:10:50,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 288 transitions, 3214 flow, removed 13 selfloop flow, removed 22 redundant places. [2024-06-14 14:10:50,412 INFO L231 Difference]: Finished difference. Result has 300 places, 247 transitions, 2384 flow [2024-06-14 14:10:50,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2384, PETRI_PLACES=300, PETRI_TRANSITIONS=247} [2024-06-14 14:10:50,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-14 14:10:50,413 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 247 transitions, 2384 flow [2024-06-14 14:10:50,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:50,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:50,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:50,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:10:50,413 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)] === [2024-06-14 14:10:50,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash -253045485, now seen corresponding path program 4 times [2024-06-14 14:10:50,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:50,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948485961] [2024-06-14 14:10:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:50,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:50,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:50,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948485961] [2024-06-14 14:10:50,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948485961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:50,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:50,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470720742] [2024-06-14 14:10:50,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:50,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:50,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:50,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:50,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 247 transitions, 2384 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:50,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:50,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:50,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:51,413 INFO L124 PetriNetUnfolderBase]: 2381/4168 cut-off events. [2024-06-14 14:10:51,413 INFO L125 PetriNetUnfolderBase]: For 530525/530525 co-relation queries the response was YES. [2024-06-14 14:10:51,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23695 conditions, 4168 events. 2381/4168 cut-off events. For 530525/530525 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 27702 event pairs, 520 based on Foata normal form. 24/4192 useless extension candidates. Maximal degree in co-relation 23558. Up to 3053 conditions per place. [2024-06-14 14:10:51,458 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 40 changer transitions 16/286 dead transitions. [2024-06-14 14:10:51,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 286 transitions, 3076 flow [2024-06-14 14:10:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:10:51,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-14 14:10:51,459 INFO L175 Difference]: Start difference. First operand has 300 places, 247 transitions, 2384 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:10:51,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 286 transitions, 3076 flow [2024-06-14 14:10:53,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 286 transitions, 2894 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:10:53,529 INFO L231 Difference]: Finished difference. Result has 297 places, 240 transitions, 2230 flow [2024-06-14 14:10:53,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2202, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2230, PETRI_PLACES=297, PETRI_TRANSITIONS=240} [2024-06-14 14:10:53,529 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-14 14:10:53,529 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 240 transitions, 2230 flow [2024-06-14 14:10:53,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:53,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:53,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:53,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:10:53,529 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)] === [2024-06-14 14:10:53,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1952676633, now seen corresponding path program 5 times [2024-06-14 14:10:53,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:53,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571506739] [2024-06-14 14:10:53,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:53,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:53,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:53,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571506739] [2024-06-14 14:10:53,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571506739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:53,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:53,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:53,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581784155] [2024-06-14 14:10:53,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:53,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:53,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:53,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 240 transitions, 2230 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:53,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:53,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:53,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:54,386 INFO L124 PetriNetUnfolderBase]: 2029/3528 cut-off events. [2024-06-14 14:10:54,386 INFO L125 PetriNetUnfolderBase]: For 277866/277870 co-relation queries the response was YES. [2024-06-14 14:10:54,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15646 conditions, 3528 events. 2029/3528 cut-off events. For 277866/277870 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22728 event pairs, 530 based on Foata normal form. 34/3562 useless extension candidates. Maximal degree in co-relation 15512. Up to 2766 conditions per place. [2024-06-14 14:10:54,422 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 27 changer transitions 30/281 dead transitions. [2024-06-14 14:10:54,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 281 transitions, 2920 flow [2024-06-14 14:10:54,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 14:10:54,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-14 14:10:54,423 INFO L175 Difference]: Start difference. First operand has 297 places, 240 transitions, 2230 flow. Second operand 10 states and 216 transitions. [2024-06-14 14:10:54,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 281 transitions, 2920 flow [2024-06-14 14:10:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 281 transitions, 2776 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-06-14 14:10:55,075 INFO L231 Difference]: Finished difference. Result has 289 places, 226 transitions, 2023 flow [2024-06-14 14:10:55,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2086, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2023, PETRI_PLACES=289, PETRI_TRANSITIONS=226} [2024-06-14 14:10:55,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-14 14:10:55,076 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 226 transitions, 2023 flow [2024-06-14 14:10:55,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:55,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:55,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:55,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:10:55,076 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)] === [2024-06-14 14:10:55,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2076813445, now seen corresponding path program 1 times [2024-06-14 14:10:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250754436] [2024-06-14 14:10:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:55,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:55,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250754436] [2024-06-14 14:10:55,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250754436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:55,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:55,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958435951] [2024-06-14 14:10:55,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:55,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:55,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:55,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:55,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 226 transitions, 2023 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:10:55,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:55,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:55,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:55,863 INFO L124 PetriNetUnfolderBase]: 2072/3589 cut-off events. [2024-06-14 14:10:55,863 INFO L125 PetriNetUnfolderBase]: For 431742/431742 co-relation queries the response was YES. [2024-06-14 14:10:55,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19993 conditions, 3589 events. 2072/3589 cut-off events. For 431742/431742 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 23025 event pairs, 583 based on Foata normal form. 18/3606 useless extension candidates. Maximal degree in co-relation 19861. Up to 1582 conditions per place. [2024-06-14 14:10:55,900 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 165 selfloop transitions, 87 changer transitions 16/274 dead transitions. [2024-06-14 14:10:55,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 274 transitions, 3119 flow [2024-06-14 14:10:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:55,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-14 14:10:55,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-14 14:10:55,901 INFO L175 Difference]: Start difference. First operand has 289 places, 226 transitions, 2023 flow. Second operand 10 states and 227 transitions. [2024-06-14 14:10:55,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 274 transitions, 3119 flow [2024-06-14 14:10:57,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 274 transitions, 2940 flow, removed 33 selfloop flow, removed 14 redundant places. [2024-06-14 14:10:57,155 INFO L231 Difference]: Finished difference. Result has 273 places, 223 transitions, 2040 flow [2024-06-14 14:10:57,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2040, PETRI_PLACES=273, PETRI_TRANSITIONS=223} [2024-06-14 14:10:57,156 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-14 14:10:57,156 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 223 transitions, 2040 flow [2024-06-14 14:10:57,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:10:57,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:57,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:57,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:10:57,156 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)] === [2024-06-14 14:10:57,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash -705746047, now seen corresponding path program 2 times [2024-06-14 14:10:57,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:57,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068976750] [2024-06-14 14:10:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:57,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:57,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068976750] [2024-06-14 14:10:57,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068976750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:57,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:57,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:57,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641416361] [2024-06-14 14:10:57,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:57,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:57,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:57,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:57,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:57,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:57,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 223 transitions, 2040 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:57,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:57,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:57,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:58,027 INFO L124 PetriNetUnfolderBase]: 2209/3813 cut-off events. [2024-06-14 14:10:58,028 INFO L125 PetriNetUnfolderBase]: For 512158/512158 co-relation queries the response was YES. [2024-06-14 14:10:58,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23796 conditions, 3813 events. 2209/3813 cut-off events. For 512158/512158 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 24732 event pairs, 672 based on Foata normal form. 18/3830 useless extension candidates. Maximal degree in co-relation 23671. Up to 2535 conditions per place. [2024-06-14 14:10:58,068 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 162 selfloop transitions, 99 changer transitions 8/275 dead transitions. [2024-06-14 14:10:58,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 275 transitions, 3102 flow [2024-06-14 14:10:58,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:10:58,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:10:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-14 14:10:58,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:10:58,069 INFO L175 Difference]: Start difference. First operand has 273 places, 223 transitions, 2040 flow. Second operand 12 states and 264 transitions. [2024-06-14 14:10:58,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 275 transitions, 3102 flow [2024-06-14 14:10:59,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 275 transitions, 2925 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:59,175 INFO L231 Difference]: Finished difference. Result has 273 places, 221 transitions, 2058 flow [2024-06-14 14:10:59,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2058, PETRI_PLACES=273, PETRI_TRANSITIONS=221} [2024-06-14 14:10:59,175 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-14 14:10:59,175 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 221 transitions, 2058 flow [2024-06-14 14:10:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:59,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:59,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:10:59,176 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)] === [2024-06-14 14:10:59,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2073088795, now seen corresponding path program 3 times [2024-06-14 14:10:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:59,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535154302] [2024-06-14 14:10:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:59,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:59,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535154302] [2024-06-14 14:10:59,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535154302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:59,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:59,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:59,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051100932] [2024-06-14 14:10:59,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:59,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:59,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:59,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:10:59,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 221 transitions, 2058 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:59,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:59,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:10:59,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:00,019 INFO L124 PetriNetUnfolderBase]: 1990/3432 cut-off events. [2024-06-14 14:11:00,019 INFO L125 PetriNetUnfolderBase]: For 348020/348020 co-relation queries the response was YES. [2024-06-14 14:11:00,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19067 conditions, 3432 events. 1990/3432 cut-off events. For 348020/348020 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 21774 event pairs, 571 based on Foata normal form. 18/3449 useless extension candidates. Maximal degree in co-relation 18943. Up to 2349 conditions per place. [2024-06-14 14:11:00,053 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 96 changer transitions 22/268 dead transitions. [2024-06-14 14:11:00,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 268 transitions, 2906 flow [2024-06-14 14:11:00,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:00,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-14 14:11:00,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-14 14:11:00,054 INFO L175 Difference]: Start difference. First operand has 273 places, 221 transitions, 2058 flow. Second operand 12 states and 258 transitions. [2024-06-14 14:11:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 268 transitions, 2906 flow [2024-06-14 14:11:01,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 268 transitions, 2701 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 14:11:01,012 INFO L231 Difference]: Finished difference. Result has 272 places, 217 transitions, 2008 flow [2024-06-14 14:11:01,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1857, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2008, PETRI_PLACES=272, PETRI_TRANSITIONS=217} [2024-06-14 14:11:01,012 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-14 14:11:01,012 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 217 transitions, 2008 flow [2024-06-14 14:11:01,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:01,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:01,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:01,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:11:01,012 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)] === [2024-06-14 14:11:01,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:01,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1233053407, now seen corresponding path program 4 times [2024-06-14 14:11:01,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:01,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080226112] [2024-06-14 14:11:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:01,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:01,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:01,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080226112] [2024-06-14 14:11:01,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080226112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:01,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:01,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:01,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633055093] [2024-06-14 14:11:01,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:01,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:01,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:01,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:01,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:01,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 217 transitions, 2008 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:01,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:01,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:01,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:01,848 INFO L124 PetriNetUnfolderBase]: 2143/3705 cut-off events. [2024-06-14 14:11:01,848 INFO L125 PetriNetUnfolderBase]: For 487907/487907 co-relation queries the response was YES. [2024-06-14 14:11:01,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23198 conditions, 3705 events. 2143/3705 cut-off events. For 487907/487907 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23980 event pairs, 711 based on Foata normal form. 18/3722 useless extension candidates. Maximal degree in co-relation 23075. Up to 2606 conditions per place. [2024-06-14 14:11:01,887 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 158 selfloop transitions, 92 changer transitions 8/264 dead transitions. [2024-06-14 14:11:01,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 264 transitions, 3024 flow [2024-06-14 14:11:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:11:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:11:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 304 transitions. [2024-06-14 14:11:01,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-06-14 14:11:01,888 INFO L175 Difference]: Start difference. First operand has 272 places, 217 transitions, 2008 flow. Second operand 15 states and 304 transitions. [2024-06-14 14:11:01,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 264 transitions, 3024 flow [2024-06-14 14:11:03,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 264 transitions, 2812 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:03,094 INFO L231 Difference]: Finished difference. Result has 268 places, 215 transitions, 1981 flow [2024-06-14 14:11:03,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1981, PETRI_PLACES=268, PETRI_TRANSITIONS=215} [2024-06-14 14:11:03,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-14 14:11:03,095 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 215 transitions, 1981 flow [2024-06-14 14:11:03,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:03,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:03,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:03,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:11:03,095 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)] === [2024-06-14 14:11:03,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1796881757, now seen corresponding path program 5 times [2024-06-14 14:11:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:03,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622819265] [2024-06-14 14:11:03,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:03,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:03,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:03,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622819265] [2024-06-14 14:11:03,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622819265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:03,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:03,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266602594] [2024-06-14 14:11:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:03,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:03,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:03,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:03,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 215 transitions, 1981 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:03,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:03,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:03,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:03,950 INFO L124 PetriNetUnfolderBase]: 2025/3507 cut-off events. [2024-06-14 14:11:03,950 INFO L125 PetriNetUnfolderBase]: For 403691/403691 co-relation queries the response was YES. [2024-06-14 14:11:03,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20349 conditions, 3507 events. 2025/3507 cut-off events. For 403691/403691 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 22472 event pairs, 695 based on Foata normal form. 24/3530 useless extension candidates. Maximal degree in co-relation 20229. Up to 2696 conditions per place. [2024-06-14 14:11:03,984 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 88 changer transitions 10/255 dead transitions. [2024-06-14 14:11:03,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 255 transitions, 2777 flow [2024-06-14 14:11:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:11:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:11:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 282 transitions. [2024-06-14 14:11:03,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035714285714286 [2024-06-14 14:11:03,985 INFO L175 Difference]: Start difference. First operand has 268 places, 215 transitions, 1981 flow. Second operand 14 states and 282 transitions. [2024-06-14 14:11:03,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 255 transitions, 2777 flow [2024-06-14 14:11:04,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 255 transitions, 2587 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-14 14:11:04,768 INFO L231 Difference]: Finished difference. Result has 266 places, 212 transitions, 1943 flow [2024-06-14 14:11:04,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1795, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1943, PETRI_PLACES=266, PETRI_TRANSITIONS=212} [2024-06-14 14:11:04,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-14 14:11:04,768 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 212 transitions, 1943 flow [2024-06-14 14:11:04,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:04,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:04,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:04,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:11:04,769 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)] === [2024-06-14 14:11:04,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash 849382289, now seen corresponding path program 6 times [2024-06-14 14:11:04,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:04,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349081816] [2024-06-14 14:11:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:04,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:04,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349081816] [2024-06-14 14:11:04,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349081816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:04,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:04,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:04,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665284144] [2024-06-14 14:11:04,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:04,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:05,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:05,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:05,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:05,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 212 transitions, 1943 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:05,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:05,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:05,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:05,655 INFO L124 PetriNetUnfolderBase]: 1973/3413 cut-off events. [2024-06-14 14:11:05,655 INFO L125 PetriNetUnfolderBase]: For 375020/375020 co-relation queries the response was YES. [2024-06-14 14:11:05,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19912 conditions, 3413 events. 1973/3413 cut-off events. For 375020/375020 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 21721 event pairs, 685 based on Foata normal form. 18/3430 useless extension candidates. Maximal degree in co-relation 19793. Up to 2420 conditions per place. [2024-06-14 14:11:05,685 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 149 selfloop transitions, 87 changer transitions 13/255 dead transitions. [2024-06-14 14:11:05,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 255 transitions, 2745 flow [2024-06-14 14:11:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:11:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:11:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-14 14:11:05,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49666666666666665 [2024-06-14 14:11:05,687 INFO L175 Difference]: Start difference. First operand has 266 places, 212 transitions, 1943 flow. Second operand 15 states and 298 transitions. [2024-06-14 14:11:05,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 255 transitions, 2745 flow [2024-06-14 14:11:06,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 255 transitions, 2567 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-14 14:11:06,563 INFO L231 Difference]: Finished difference. Result has 266 places, 209 transitions, 1917 flow [2024-06-14 14:11:06,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1917, PETRI_PLACES=266, PETRI_TRANSITIONS=209} [2024-06-14 14:11:06,563 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-14 14:11:06,563 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 209 transitions, 1917 flow [2024-06-14 14:11:06,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:06,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:06,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:06,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:11:06,564 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)] === [2024-06-14 14:11:06,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:06,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1395520433, now seen corresponding path program 7 times [2024-06-14 14:11:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:06,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486939005] [2024-06-14 14:11:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:06,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:06,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:06,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486939005] [2024-06-14 14:11:06,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486939005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:06,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:06,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:06,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767722416] [2024-06-14 14:11:06,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:06,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:06,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:06,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:06,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:06,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:06,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 209 transitions, 1917 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:06,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:06,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:06,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:07,377 INFO L124 PetriNetUnfolderBase]: 1975/3409 cut-off events. [2024-06-14 14:11:07,377 INFO L125 PetriNetUnfolderBase]: For 391651/391651 co-relation queries the response was YES. [2024-06-14 14:11:07,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19797 conditions, 3409 events. 1975/3409 cut-off events. For 391651/391651 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21715 event pairs, 721 based on Foata normal form. 26/3434 useless extension candidates. Maximal degree in co-relation 19679. Up to 2865 conditions per place. [2024-06-14 14:11:07,411 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 141 selfloop transitions, 83 changer transitions 12/242 dead transitions. [2024-06-14 14:11:07,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 242 transitions, 2487 flow [2024-06-14 14:11:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:11:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:11:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 274 transitions. [2024-06-14 14:11:07,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-14 14:11:07,412 INFO L175 Difference]: Start difference. First operand has 266 places, 209 transitions, 1917 flow. Second operand 14 states and 274 transitions. [2024-06-14 14:11:07,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 242 transitions, 2487 flow [2024-06-14 14:11:08,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 242 transitions, 2315 flow, removed 3 selfloop flow, removed 14 redundant places. [2024-06-14 14:11:08,140 INFO L231 Difference]: Finished difference. Result has 262 places, 205 transitions, 1886 flow [2024-06-14 14:11:08,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1886, PETRI_PLACES=262, PETRI_TRANSITIONS=205} [2024-06-14 14:11:08,141 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-14 14:11:08,141 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 205 transitions, 1886 flow [2024-06-14 14:11:08,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:08,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:08,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:08,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:11:08,141 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)] === [2024-06-14 14:11:08,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:08,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1400882813, now seen corresponding path program 8 times [2024-06-14 14:11:08,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:08,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582036421] [2024-06-14 14:11:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:08,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:08,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582036421] [2024-06-14 14:11:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582036421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:08,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:08,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:08,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086634036] [2024-06-14 14:11:08,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:08,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:08,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:08,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:08,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:08,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:08,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 205 transitions, 1886 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:08,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:08,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:08,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:08,889 INFO L124 PetriNetUnfolderBase]: 1841/3193 cut-off events. [2024-06-14 14:11:08,889 INFO L125 PetriNetUnfolderBase]: For 292869/292869 co-relation queries the response was YES. [2024-06-14 14:11:08,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16865 conditions, 3193 events. 1841/3193 cut-off events. For 292869/292869 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20136 event pairs, 644 based on Foata normal form. 26/3218 useless extension candidates. Maximal degree in co-relation 16749. Up to 2654 conditions per place. [2024-06-14 14:11:08,919 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 78 changer transitions 14/237 dead transitions. [2024-06-14 14:11:08,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 237 transitions, 2444 flow [2024-06-14 14:11:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:11:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:11:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 256 transitions. [2024-06-14 14:11:08,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-06-14 14:11:08,920 INFO L175 Difference]: Start difference. First operand has 262 places, 205 transitions, 1886 flow. Second operand 13 states and 256 transitions. [2024-06-14 14:11:08,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 237 transitions, 2444 flow [2024-06-14 14:11:09,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 237 transitions, 2274 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-14 14:11:09,758 INFO L231 Difference]: Finished difference. Result has 259 places, 200 transitions, 1836 flow [2024-06-14 14:11:09,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1836, PETRI_PLACES=259, PETRI_TRANSITIONS=200} [2024-06-14 14:11:09,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-14 14:11:09,758 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 200 transitions, 1836 flow [2024-06-14 14:11:09,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:09,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:09,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:09,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:11:09,759 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)] === [2024-06-14 14:11:09,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:09,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1089184515, now seen corresponding path program 9 times [2024-06-14 14:11:09,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:09,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962108202] [2024-06-14 14:11:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:09,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:09,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:09,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962108202] [2024-06-14 14:11:09,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962108202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:09,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:09,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062388097] [2024-06-14 14:11:09,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:09,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:09,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:10,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:10,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 200 transitions, 1836 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:10,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:10,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:10,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:10,477 INFO L124 PetriNetUnfolderBase]: 1711/2979 cut-off events. [2024-06-14 14:11:10,478 INFO L125 PetriNetUnfolderBase]: For 207455/207455 co-relation queries the response was YES. [2024-06-14 14:11:10,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14224 conditions, 2979 events. 1711/2979 cut-off events. For 207455/207455 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18545 event pairs, 520 based on Foata normal form. 24/3002 useless extension candidates. Maximal degree in co-relation 14109. Up to 2420 conditions per place. [2024-06-14 14:11:10,504 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 130 selfloop transitions, 73 changer transitions 26/235 dead transitions. [2024-06-14 14:11:10,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 235 transitions, 2410 flow [2024-06-14 14:11:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-14 14:11:10,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-14 14:11:10,505 INFO L175 Difference]: Start difference. First operand has 259 places, 200 transitions, 1836 flow. Second operand 12 states and 242 transitions. [2024-06-14 14:11:10,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 235 transitions, 2410 flow [2024-06-14 14:11:11,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 235 transitions, 2248 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:11,010 INFO L231 Difference]: Finished difference. Result has 253 places, 194 transitions, 1763 flow [2024-06-14 14:11:11,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1674, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1763, PETRI_PLACES=253, PETRI_TRANSITIONS=194} [2024-06-14 14:11:11,010 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-14 14:11:11,010 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 194 transitions, 1763 flow [2024-06-14 14:11:11,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:11,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:11,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:11,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:11:11,011 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)] === [2024-06-14 14:11:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1281671635, now seen corresponding path program 10 times [2024-06-14 14:11:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056314348] [2024-06-14 14:11:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:11,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056314348] [2024-06-14 14:11:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056314348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:11,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:11,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079606469] [2024-06-14 14:11:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:11,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:11,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:11,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:11,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 194 transitions, 1763 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:11,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:11,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:11,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:11,742 INFO L124 PetriNetUnfolderBase]: 1678/2900 cut-off events. [2024-06-14 14:11:11,742 INFO L125 PetriNetUnfolderBase]: For 203218/203218 co-relation queries the response was YES. [2024-06-14 14:11:11,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13792 conditions, 2900 events. 1678/2900 cut-off events. For 203218/203218 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17895 event pairs, 554 based on Foata normal form. 26/2925 useless extension candidates. Maximal degree in co-relation 13679. Up to 2414 conditions per place. [2024-06-14 14:11:11,767 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 139 selfloop transitions, 66 changer transitions 12/223 dead transitions. [2024-06-14 14:11:11,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 223 transitions, 2285 flow [2024-06-14 14:11:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:11:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:11:11,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 257 transitions. [2024-06-14 14:11:11,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49423076923076925 [2024-06-14 14:11:11,768 INFO L175 Difference]: Start difference. First operand has 253 places, 194 transitions, 1763 flow. Second operand 13 states and 257 transitions. [2024-06-14 14:11:11,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 223 transitions, 2285 flow [2024-06-14 14:11:12,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 223 transitions, 2122 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:12,152 INFO L231 Difference]: Finished difference. Result has 244 places, 190 transitions, 1710 flow [2024-06-14 14:11:12,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1710, PETRI_PLACES=244, PETRI_TRANSITIONS=190} [2024-06-14 14:11:12,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-14 14:11:12,153 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 190 transitions, 1710 flow [2024-06-14 14:11:12,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:12,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:12,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:12,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:11:12,153 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:12,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1775614883, now seen corresponding path program 1 times [2024-06-14 14:11:12,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:12,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47771026] [2024-06-14 14:11:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:12,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:12,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:12,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47771026] [2024-06-14 14:11:12,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47771026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:12,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:12,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:12,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009028276] [2024-06-14 14:11:12,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:12,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:12,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:12,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:12,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:12,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 190 transitions, 1710 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:12,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:12,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:12,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:12,853 INFO L124 PetriNetUnfolderBase]: 1871/3257 cut-off events. [2024-06-14 14:11:12,853 INFO L125 PetriNetUnfolderBase]: For 291125/291125 co-relation queries the response was YES. [2024-06-14 14:11:12,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18081 conditions, 3257 events. 1871/3257 cut-off events. For 291125/291125 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 20719 event pairs, 587 based on Foata normal form. 18/3274 useless extension candidates. Maximal degree in co-relation 17971. Up to 1084 conditions per place. [2024-06-14 14:11:12,881 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 80 changer transitions 17/235 dead transitions. [2024-06-14 14:11:12,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 235 transitions, 2620 flow [2024-06-14 14:11:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:12,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:12,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 14:11:12,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-14 14:11:12,882 INFO L175 Difference]: Start difference. First operand has 244 places, 190 transitions, 1710 flow. Second operand 10 states and 223 transitions. [2024-06-14 14:11:12,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 235 transitions, 2620 flow [2024-06-14 14:11:13,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 235 transitions, 2476 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:13,263 INFO L231 Difference]: Finished difference. Result has 239 places, 186 transitions, 1700 flow [2024-06-14 14:11:13,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1700, PETRI_PLACES=239, PETRI_TRANSITIONS=186} [2024-06-14 14:11:13,263 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-14 14:11:13,263 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 186 transitions, 1700 flow [2024-06-14 14:11:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:13,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:13,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:13,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:11:13,263 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:13,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1315524759, now seen corresponding path program 2 times [2024-06-14 14:11:13,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:13,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84893353] [2024-06-14 14:11:13,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:13,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:13,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:13,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84893353] [2024-06-14 14:11:13,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84893353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:13,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:13,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:13,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549542543] [2024-06-14 14:11:13,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:13,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:13,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:13,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:13,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 186 transitions, 1700 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:13,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:13,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:13,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:14,062 INFO L124 PetriNetUnfolderBase]: 1871/3243 cut-off events. [2024-06-14 14:11:14,062 INFO L125 PetriNetUnfolderBase]: For 330202/330202 co-relation queries the response was YES. [2024-06-14 14:11:14,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19323 conditions, 3243 events. 1871/3243 cut-off events. For 330202/330202 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 20558 event pairs, 635 based on Foata normal form. 18/3254 useless extension candidates. Maximal degree in co-relation 19214. Up to 2443 conditions per place. [2024-06-14 14:11:14,091 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 141 selfloop transitions, 74 changer transitions 8/229 dead transitions. [2024-06-14 14:11:14,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 229 transitions, 2436 flow [2024-06-14 14:11:14,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 14:11:14,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-14 14:11:14,092 INFO L175 Difference]: Start difference. First operand has 239 places, 186 transitions, 1700 flow. Second operand 12 states and 254 transitions. [2024-06-14 14:11:14,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 229 transitions, 2436 flow [2024-06-14 14:11:14,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 229 transitions, 2288 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:14,486 INFO L231 Difference]: Finished difference. Result has 239 places, 184 transitions, 1692 flow [2024-06-14 14:11:14,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1692, PETRI_PLACES=239, PETRI_TRANSITIONS=184} [2024-06-14 14:11:14,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-14 14:11:14,486 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 184 transitions, 1692 flow [2024-06-14 14:11:14,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:14,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:14,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:11:14,486 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:14,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash -232387345, now seen corresponding path program 3 times [2024-06-14 14:11:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994784266] [2024-06-14 14:11:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:14,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:14,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994784266] [2024-06-14 14:11:14,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994784266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:14,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:14,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:14,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321675685] [2024-06-14 14:11:14,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:14,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:14,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:14,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:14,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:14,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:14,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 184 transitions, 1692 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:14,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:14,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:14,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:15,198 INFO L124 PetriNetUnfolderBase]: 1652/2854 cut-off events. [2024-06-14 14:11:15,199 INFO L125 PetriNetUnfolderBase]: For 217727/217727 co-relation queries the response was YES. [2024-06-14 14:11:15,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15221 conditions, 2854 events. 1652/2854 cut-off events. For 217727/217727 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17600 event pairs, 535 based on Foata normal form. 18/2865 useless extension candidates. Maximal degree in co-relation 15113. Up to 2257 conditions per place. [2024-06-14 14:11:15,226 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 126 selfloop transitions, 71 changer transitions 19/222 dead transitions. [2024-06-14 14:11:15,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 222 transitions, 2248 flow [2024-06-14 14:11:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:15,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:15,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 14:11:15,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-14 14:11:15,227 INFO L175 Difference]: Start difference. First operand has 239 places, 184 transitions, 1692 flow. Second operand 12 states and 248 transitions. [2024-06-14 14:11:15,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 222 transitions, 2248 flow [2024-06-14 14:11:15,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 222 transitions, 2097 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 14:11:15,629 INFO L231 Difference]: Finished difference. Result has 238 places, 180 transitions, 1646 flow [2024-06-14 14:11:15,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1646, PETRI_PLACES=238, PETRI_TRANSITIONS=180} [2024-06-14 14:11:15,629 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-14 14:11:15,629 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 180 transitions, 1646 flow [2024-06-14 14:11:15,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:15,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:15,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:15,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:11:15,630 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:15,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:15,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1506109543, now seen corresponding path program 4 times [2024-06-14 14:11:15,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:15,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573830912] [2024-06-14 14:11:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:15,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573830912] [2024-06-14 14:11:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573830912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:15,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:15,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695408898] [2024-06-14 14:11:15,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:15,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:15,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:15,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:15,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:15,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:15,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 180 transitions, 1646 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:15,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:15,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:15,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:16,447 INFO L124 PetriNetUnfolderBase]: 1763/3061 cut-off events. [2024-06-14 14:11:16,447 INFO L125 PetriNetUnfolderBase]: For 288453/288453 co-relation queries the response was YES. [2024-06-14 14:11:16,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17507 conditions, 3061 events. 1763/3061 cut-off events. For 288453/288453 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 19439 event pairs, 640 based on Foata normal form. 24/3084 useless extension candidates. Maximal degree in co-relation 17400. Up to 2325 conditions per place. [2024-06-14 14:11:16,474 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 137 selfloop transitions, 63 changer transitions 10/216 dead transitions. [2024-06-14 14:11:16,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 216 transitions, 2328 flow [2024-06-14 14:11:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:11:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:11:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 261 transitions. [2024-06-14 14:11:16,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019230769230769 [2024-06-14 14:11:16,476 INFO L175 Difference]: Start difference. First operand has 238 places, 180 transitions, 1646 flow. Second operand 13 states and 261 transitions. [2024-06-14 14:11:16,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 216 transitions, 2328 flow [2024-06-14 14:11:16,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 216 transitions, 2172 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:16,878 INFO L231 Difference]: Finished difference. Result has 232 places, 177 transitions, 1604 flow [2024-06-14 14:11:16,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1604, PETRI_PLACES=232, PETRI_TRANSITIONS=177} [2024-06-14 14:11:16,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-14 14:11:16,878 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 177 transitions, 1604 flow [2024-06-14 14:11:16,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:11:16,879 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:16,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1738178945, now seen corresponding path program 5 times [2024-06-14 14:11:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278294544] [2024-06-14 14:11:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:17,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:17,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278294544] [2024-06-14 14:11:17,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278294544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:17,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399599563] [2024-06-14 14:11:17,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:17,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:17,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:17,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:17,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:17,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:17,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 177 transitions, 1604 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:17,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:17,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:17,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:17,587 INFO L124 PetriNetUnfolderBase]: 1731/2997 cut-off events. [2024-06-14 14:11:17,587 INFO L125 PetriNetUnfolderBase]: For 271807/271807 co-relation queries the response was YES. [2024-06-14 14:11:17,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17046 conditions, 2997 events. 1731/2997 cut-off events. For 271807/271807 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 18748 event pairs, 624 based on Foata normal form. 24/3020 useless extension candidates. Maximal degree in co-relation 16942. Up to 2277 conditions per place. [2024-06-14 14:11:17,614 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 135 selfloop transitions, 60 changer transitions 12/213 dead transitions. [2024-06-14 14:11:17,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 213 transitions, 2276 flow [2024-06-14 14:11:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:11:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:11:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-14 14:11:17,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980769230769231 [2024-06-14 14:11:17,616 INFO L175 Difference]: Start difference. First operand has 232 places, 177 transitions, 1604 flow. Second operand 13 states and 259 transitions. [2024-06-14 14:11:17,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 213 transitions, 2276 flow [2024-06-14 14:11:17,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 213 transitions, 2145 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:17,927 INFO L231 Difference]: Finished difference. Result has 231 places, 173 transitions, 1566 flow [2024-06-14 14:11:17,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1566, PETRI_PLACES=231, PETRI_TRANSITIONS=173} [2024-06-14 14:11:17,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-14 14:11:17,927 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 173 transitions, 1566 flow [2024-06-14 14:11:17,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:17,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:17,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:17,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:11:17,928 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:17,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:17,928 INFO L85 PathProgramCache]: Analyzing trace with hash -229489267, now seen corresponding path program 6 times [2024-06-14 14:11:17,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:17,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389721975] [2024-06-14 14:11:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:17,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:18,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389721975] [2024-06-14 14:11:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389721975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:18,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206850744] [2024-06-14 14:11:18,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:18,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:18,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:18,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 173 transitions, 1566 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:18,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:18,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:18,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:18,589 INFO L124 PetriNetUnfolderBase]: 1579/2747 cut-off events. [2024-06-14 14:11:18,589 INFO L125 PetriNetUnfolderBase]: For 211499/211499 co-relation queries the response was YES. [2024-06-14 14:11:18,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14417 conditions, 2747 events. 1579/2747 cut-off events. For 211499/211499 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 17008 event pairs, 589 based on Foata normal form. 26/2772 useless extension candidates. Maximal degree in co-relation 14314. Up to 2277 conditions per place. [2024-06-14 14:11:18,616 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 55 changer transitions 14/200 dead transitions. [2024-06-14 14:11:18,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 200 transitions, 2038 flow [2024-06-14 14:11:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 14:11:18,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:11:18,618 INFO L175 Difference]: Start difference. First operand has 231 places, 173 transitions, 1566 flow. Second operand 11 states and 220 transitions. [2024-06-14 14:11:18,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 200 transitions, 2038 flow [2024-06-14 14:11:18,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 200 transitions, 1915 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:18,999 INFO L231 Difference]: Finished difference. Result has 226 places, 168 transitions, 1518 flow [2024-06-14 14:11:18,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1443, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1518, PETRI_PLACES=226, PETRI_TRANSITIONS=168} [2024-06-14 14:11:19,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-14 14:11:19,000 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 168 transitions, 1518 flow [2024-06-14 14:11:19,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:19,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:19,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:19,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:11:19,000 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:19,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:19,000 INFO L85 PathProgramCache]: Analyzing trace with hash 978265777, now seen corresponding path program 7 times [2024-06-14 14:11:19,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:19,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210139478] [2024-06-14 14:11:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:19,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:19,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:19,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210139478] [2024-06-14 14:11:19,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210139478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:19,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:19,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:19,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339212948] [2024-06-14 14:11:19,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:19,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:19,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:19,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:19,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 168 transitions, 1518 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:19,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:19,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:19,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:19,651 INFO L124 PetriNetUnfolderBase]: 1624/2844 cut-off events. [2024-06-14 14:11:19,651 INFO L125 PetriNetUnfolderBase]: For 218797/218797 co-relation queries the response was YES. [2024-06-14 14:11:19,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15599 conditions, 2844 events. 1624/2844 cut-off events. For 218797/218797 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 17828 event pairs, 559 based on Foata normal form. 18/2861 useless extension candidates. Maximal degree in co-relation 15498. Up to 2199 conditions per place. [2024-06-14 14:11:19,675 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 56 changer transitions 8/203 dead transitions. [2024-06-14 14:11:19,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 203 transitions, 2152 flow [2024-06-14 14:11:19,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-14 14:11:19,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136363636363637 [2024-06-14 14:11:19,676 INFO L175 Difference]: Start difference. First operand has 226 places, 168 transitions, 1518 flow. Second operand 11 states and 226 transitions. [2024-06-14 14:11:19,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 203 transitions, 2152 flow [2024-06-14 14:11:19,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 203 transitions, 2030 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:19,982 INFO L231 Difference]: Finished difference. Result has 220 places, 166 transitions, 1501 flow [2024-06-14 14:11:19,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1501, PETRI_PLACES=220, PETRI_TRANSITIONS=166} [2024-06-14 14:11:19,982 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-14 14:11:19,983 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 166 transitions, 1501 flow [2024-06-14 14:11:19,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:19,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:19,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:19,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:11:19,983 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:19,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash -233903977, now seen corresponding path program 8 times [2024-06-14 14:11:19,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:19,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871766849] [2024-06-14 14:11:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:19,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:20,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:20,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871766849] [2024-06-14 14:11:20,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871766849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:20,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:20,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:20,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405353454] [2024-06-14 14:11:20,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:20,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:20,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:20,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:20,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:20,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:20,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 166 transitions, 1501 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:20,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:20,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:20,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:20,604 INFO L124 PetriNetUnfolderBase]: 1519/2647 cut-off events. [2024-06-14 14:11:20,604 INFO L125 PetriNetUnfolderBase]: For 170945/170945 co-relation queries the response was YES. [2024-06-14 14:11:20,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13759 conditions, 2647 events. 1519/2647 cut-off events. For 170945/170945 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 16255 event pairs, 531 based on Foata normal form. 18/2664 useless extension candidates. Maximal degree in co-relation 13660. Up to 2199 conditions per place. [2024-06-14 14:11:20,627 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 52 changer transitions 21/196 dead transitions. [2024-06-14 14:11:20,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 196 transitions, 1969 flow [2024-06-14 14:11:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-14 14:11:20,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:11:20,628 INFO L175 Difference]: Start difference. First operand has 220 places, 166 transitions, 1501 flow. Second operand 11 states and 220 transitions. [2024-06-14 14:11:20,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 196 transitions, 1969 flow [2024-06-14 14:11:20,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 196 transitions, 1854 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:20,935 INFO L231 Difference]: Finished difference. Result has 219 places, 161 transitions, 1441 flow [2024-06-14 14:11:20,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1386, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1441, PETRI_PLACES=219, PETRI_TRANSITIONS=161} [2024-06-14 14:11:20,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-14 14:11:20,936 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 161 transitions, 1441 flow [2024-06-14 14:11:20,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:20,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:20,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:20,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:11:20,936 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:20,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:20,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1448737789, now seen corresponding path program 9 times [2024-06-14 14:11:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011184458] [2024-06-14 14:11:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:21,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011184458] [2024-06-14 14:11:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011184458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:21,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:21,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:21,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199168552] [2024-06-14 14:11:21,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:21,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:21,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:21,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 161 transitions, 1441 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:21,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:21,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:21,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:21,601 INFO L124 PetriNetUnfolderBase]: 1650/2877 cut-off events. [2024-06-14 14:11:21,601 INFO L125 PetriNetUnfolderBase]: For 233318/233318 co-relation queries the response was YES. [2024-06-14 14:11:21,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16471 conditions, 2877 events. 1650/2877 cut-off events. For 233318/233318 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17959 event pairs, 606 based on Foata normal form. 18/2895 useless extension candidates. Maximal degree in co-relation 16373. Up to 2115 conditions per place. [2024-06-14 14:11:21,624 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 167 selfloop transitions, 13 changer transitions 8/194 dead transitions. [2024-06-14 14:11:21,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 194 transitions, 2177 flow [2024-06-14 14:11:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:21,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 14:11:21,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-14 14:11:21,625 INFO L175 Difference]: Start difference. First operand has 219 places, 161 transitions, 1441 flow. Second operand 9 states and 188 transitions. [2024-06-14 14:11:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 194 transitions, 2177 flow [2024-06-14 14:11:21,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 194 transitions, 2047 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:21,944 INFO L231 Difference]: Finished difference. Result has 209 places, 159 transitions, 1341 flow [2024-06-14 14:11:21,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1341, PETRI_PLACES=209, PETRI_TRANSITIONS=159} [2024-06-14 14:11:21,945 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-14 14:11:21,945 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 159 transitions, 1341 flow [2024-06-14 14:11:21,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:21,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:21,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:21,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:11:21,945 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:21,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:21,945 INFO L85 PathProgramCache]: Analyzing trace with hash 369348273, now seen corresponding path program 10 times [2024-06-14 14:11:21,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:21,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195651332] [2024-06-14 14:11:21,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:21,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:22,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:22,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195651332] [2024-06-14 14:11:22,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195651332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:22,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:22,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291153361] [2024-06-14 14:11:22,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:22,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:22,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:22,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:22,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:22,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 159 transitions, 1341 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:22,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:22,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:22,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:22,559 INFO L124 PetriNetUnfolderBase]: 1545/2704 cut-off events. [2024-06-14 14:11:22,559 INFO L125 PetriNetUnfolderBase]: For 180648/180648 co-relation queries the response was YES. [2024-06-14 14:11:22,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14510 conditions, 2704 events. 1545/2704 cut-off events. For 180648/180648 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 16783 event pairs, 529 based on Foata normal form. 18/2722 useless extension candidates. Maximal degree in co-relation 14415. Up to 2115 conditions per place. [2024-06-14 14:11:22,582 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 161 selfloop transitions, 12 changer transitions 10/189 dead transitions. [2024-06-14 14:11:22,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 189 transitions, 1927 flow [2024-06-14 14:11:22,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:22,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 14:11:22,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 14:11:22,583 INFO L175 Difference]: Start difference. First operand has 209 places, 159 transitions, 1341 flow. Second operand 9 states and 185 transitions. [2024-06-14 14:11:22,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 189 transitions, 1927 flow [2024-06-14 14:11:22,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 189 transitions, 1894 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:22,853 INFO L231 Difference]: Finished difference. Result has 208 places, 155 transitions, 1300 flow [2024-06-14 14:11:22,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1300, PETRI_PLACES=208, PETRI_TRANSITIONS=155} [2024-06-14 14:11:22,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-14 14:11:22,854 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 155 transitions, 1300 flow [2024-06-14 14:11:22,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:22,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:22,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:22,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:11:22,854 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:22,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash -216164165, now seen corresponding path program 11 times [2024-06-14 14:11:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542527905] [2024-06-14 14:11:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542527905] [2024-06-14 14:11:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542527905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:23,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:23,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495090376] [2024-06-14 14:11:23,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:23,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:23,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:23,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:23,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:23,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 155 transitions, 1300 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:23,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:23,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:23,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:23,454 INFO L124 PetriNetUnfolderBase]: 1518/2653 cut-off events. [2024-06-14 14:11:23,454 INFO L125 PetriNetUnfolderBase]: For 174288/174288 co-relation queries the response was YES. [2024-06-14 14:11:23,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14237 conditions, 2653 events. 1518/2653 cut-off events. For 174288/174288 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 16337 event pairs, 529 based on Foata normal form. 18/2671 useless extension candidates. Maximal degree in co-relation 14143. Up to 2115 conditions per place. [2024-06-14 14:11:23,475 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 160 selfloop transitions, 11 changer transitions 8/185 dead transitions. [2024-06-14 14:11:23,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 185 transitions, 1878 flow [2024-06-14 14:11:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:23,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 14:11:23,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-06-14 14:11:23,476 INFO L175 Difference]: Start difference. First operand has 208 places, 155 transitions, 1300 flow. Second operand 9 states and 182 transitions. [2024-06-14 14:11:23,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 185 transitions, 1878 flow [2024-06-14 14:11:23,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 185 transitions, 1850 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:23,757 INFO L231 Difference]: Finished difference. Result has 204 places, 153 transitions, 1284 flow [2024-06-14 14:11:23,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1284, PETRI_PLACES=204, PETRI_TRANSITIONS=153} [2024-06-14 14:11:23,758 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-14 14:11:23,758 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 153 transitions, 1284 flow [2024-06-14 14:11:23,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:23,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:23,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:23,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:11:23,758 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:23,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash -215956775, now seen corresponding path program 12 times [2024-06-14 14:11:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:23,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131684151] [2024-06-14 14:11:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:23,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:23,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:23,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131684151] [2024-06-14 14:11:23,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131684151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:23,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:23,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:23,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838061868] [2024-06-14 14:11:23,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:23,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:23,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:23,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:24,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:24,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 153 transitions, 1284 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:24,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:24,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:24,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:24,349 INFO L124 PetriNetUnfolderBase]: 1413/2468 cut-off events. [2024-06-14 14:11:24,350 INFO L125 PetriNetUnfolderBase]: For 144816/144816 co-relation queries the response was YES. [2024-06-14 14:11:24,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12646 conditions, 2468 events. 1413/2468 cut-off events. For 144816/144816 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 14935 event pairs, 511 based on Foata normal form. 18/2486 useless extension candidates. Maximal degree in co-relation 12553. Up to 2115 conditions per place. [2024-06-14 14:11:24,370 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 140 selfloop transitions, 6 changer transitions 26/178 dead transitions. [2024-06-14 14:11:24,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 178 transitions, 1708 flow [2024-06-14 14:11:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 14:11:24,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2024-06-14 14:11:24,371 INFO L175 Difference]: Start difference. First operand has 204 places, 153 transitions, 1284 flow. Second operand 9 states and 176 transitions. [2024-06-14 14:11:24,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 178 transitions, 1708 flow [2024-06-14 14:11:24,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 178 transitions, 1685 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:24,686 INFO L231 Difference]: Finished difference. Result has 204 places, 147 transitions, 1214 flow [2024-06-14 14:11:24,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1214, PETRI_PLACES=204, PETRI_TRANSITIONS=147} [2024-06-14 14:11:24,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-14 14:11:24,687 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 147 transitions, 1214 flow [2024-06-14 14:11:24,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:11:24,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:24,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:24,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:11:24,687 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:24,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:24,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1858114611, now seen corresponding path program 11 times [2024-06-14 14:11:24,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:24,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606489847] [2024-06-14 14:11:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:24,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:24,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:24,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:24,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606489847] [2024-06-14 14:11:24,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606489847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:24,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:24,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:24,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725113359] [2024-06-14 14:11:24,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:24,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:24,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:24,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:24,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:24,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:24,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 147 transitions, 1214 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:24,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:24,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:24,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:25,371 INFO L124 PetriNetUnfolderBase]: 1459/2528 cut-off events. [2024-06-14 14:11:25,371 INFO L125 PetriNetUnfolderBase]: For 174048/174048 co-relation queries the response was YES. [2024-06-14 14:11:25,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13718 conditions, 2528 events. 1459/2528 cut-off events. For 174048/174048 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15319 event pairs, 497 based on Foata normal form. 18/2538 useless extension candidates. Maximal degree in co-relation 13625. Up to 1759 conditions per place. [2024-06-14 14:11:25,393 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 109 selfloop transitions, 66 changer transitions 12/193 dead transitions. [2024-06-14 14:11:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 193 transitions, 1860 flow [2024-06-14 14:11:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:11:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:11:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-14 14:11:25,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5053571428571428 [2024-06-14 14:11:25,394 INFO L175 Difference]: Start difference. First operand has 204 places, 147 transitions, 1214 flow. Second operand 14 states and 283 transitions. [2024-06-14 14:11:25,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 193 transitions, 1860 flow [2024-06-14 14:11:25,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 193 transitions, 1826 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:25,626 INFO L231 Difference]: Finished difference. Result has 198 places, 145 transitions, 1301 flow [2024-06-14 14:11:25,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1301, PETRI_PLACES=198, PETRI_TRANSITIONS=145} [2024-06-14 14:11:25,627 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-14 14:11:25,627 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 145 transitions, 1301 flow [2024-06-14 14:11:25,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:25,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:25,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:25,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:11:25,628 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:25,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1667465065, now seen corresponding path program 12 times [2024-06-14 14:11:25,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:25,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371933305] [2024-06-14 14:11:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:25,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:25,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371933305] [2024-06-14 14:11:25,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371933305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:25,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:25,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:25,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499902840] [2024-06-14 14:11:25,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:25,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:25,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:25,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:25,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 145 transitions, 1301 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:25,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:25,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:25,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:26,345 INFO L124 PetriNetUnfolderBase]: 1354/2329 cut-off events. [2024-06-14 14:11:26,346 INFO L125 PetriNetUnfolderBase]: For 144860/144860 co-relation queries the response was YES. [2024-06-14 14:11:26,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12306 conditions, 2329 events. 1354/2329 cut-off events. For 144860/144860 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 13712 event pairs, 475 based on Foata normal form. 18/2339 useless extension candidates. Maximal degree in co-relation 12217. Up to 1759 conditions per place. [2024-06-14 14:11:26,365 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 93 selfloop transitions, 62 changer transitions 19/180 dead transitions. [2024-06-14 14:11:26,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 180 transitions, 1763 flow [2024-06-14 14:11:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:26,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-14 14:11:26,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-14 14:11:26,366 INFO L175 Difference]: Start difference. First operand has 198 places, 145 transitions, 1301 flow. Second operand 12 states and 244 transitions. [2024-06-14 14:11:26,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 180 transitions, 1763 flow [2024-06-14 14:11:26,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 180 transitions, 1628 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:26,634 INFO L231 Difference]: Finished difference. Result has 195 places, 141 transitions, 1255 flow [2024-06-14 14:11:26,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1166, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1255, PETRI_PLACES=195, PETRI_TRANSITIONS=141} [2024-06-14 14:11:26,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-14 14:11:26,635 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 141 transitions, 1255 flow [2024-06-14 14:11:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:26,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:26,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:11:26,635 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:26,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:26,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1082667695, now seen corresponding path program 13 times [2024-06-14 14:11:26,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:26,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051533689] [2024-06-14 14:11:26,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:26,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:26,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:26,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051533689] [2024-06-14 14:11:26,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051533689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:26,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:26,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:26,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126512348] [2024-06-14 14:11:26,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:26,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:26,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:26,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:26,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 141 transitions, 1255 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:26,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:26,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:26,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:27,387 INFO L124 PetriNetUnfolderBase]: 1465/2537 cut-off events. [2024-06-14 14:11:27,388 INFO L125 PetriNetUnfolderBase]: For 190767/190767 co-relation queries the response was YES. [2024-06-14 14:11:27,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14269 conditions, 2537 events. 1465/2537 cut-off events. For 190767/190767 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15475 event pairs, 579 based on Foata normal form. 24/2560 useless extension candidates. Maximal degree in co-relation 14181. Up to 1885 conditions per place. [2024-06-14 14:11:27,410 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 107 selfloop transitions, 52 changer transitions 10/175 dead transitions. [2024-06-14 14:11:27,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 175 transitions, 1823 flow [2024-06-14 14:11:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:11:27,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:11:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2024-06-14 14:11:27,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49464285714285716 [2024-06-14 14:11:27,412 INFO L175 Difference]: Start difference. First operand has 195 places, 141 transitions, 1255 flow. Second operand 14 states and 277 transitions. [2024-06-14 14:11:27,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 175 transitions, 1823 flow [2024-06-14 14:11:27,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 175 transitions, 1685 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:27,643 INFO L231 Difference]: Finished difference. Result has 190 places, 138 transitions, 1209 flow [2024-06-14 14:11:27,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1209, PETRI_PLACES=190, PETRI_TRANSITIONS=138} [2024-06-14 14:11:27,643 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-14 14:11:27,643 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 138 transitions, 1209 flow [2024-06-14 14:11:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:27,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:27,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:27,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:11:27,644 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:27,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1082488205, now seen corresponding path program 14 times [2024-06-14 14:11:27,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:27,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759378529] [2024-06-14 14:11:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:27,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:27,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:27,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759378529] [2024-06-14 14:11:27,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759378529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:27,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:27,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:27,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837180102] [2024-06-14 14:11:27,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:27,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:27,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:27,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:27,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:27,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 138 transitions, 1209 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:27,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:27,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:27,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:28,315 INFO L124 PetriNetUnfolderBase]: 1441/2485 cut-off events. [2024-06-14 14:11:28,316 INFO L125 PetriNetUnfolderBase]: For 180321/180321 co-relation queries the response was YES. [2024-06-14 14:11:28,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13828 conditions, 2485 events. 1441/2485 cut-off events. For 180321/180321 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15042 event pairs, 611 based on Foata normal form. 26/2510 useless extension candidates. Maximal degree in co-relation 13743. Up to 2096 conditions per place. [2024-06-14 14:11:28,335 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 98 selfloop transitions, 47 changer transitions 14/165 dead transitions. [2024-06-14 14:11:28,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 165 transitions, 1609 flow [2024-06-14 14:11:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:11:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:11:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 270 transitions. [2024-06-14 14:11:28,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-14 14:11:28,336 INFO L175 Difference]: Start difference. First operand has 190 places, 138 transitions, 1209 flow. Second operand 14 states and 270 transitions. [2024-06-14 14:11:28,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 165 transitions, 1609 flow [2024-06-14 14:11:28,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 165 transitions, 1507 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-14 14:11:28,565 INFO L231 Difference]: Finished difference. Result has 189 places, 133 transitions, 1170 flow [2024-06-14 14:11:28,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1170, PETRI_PLACES=189, PETRI_TRANSITIONS=133} [2024-06-14 14:11:28,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-14 14:11:28,565 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 133 transitions, 1170 flow [2024-06-14 14:11:28,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:28,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:28,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:28,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:11:28,565 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:28,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1745257545, now seen corresponding path program 15 times [2024-06-14 14:11:28,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:28,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900899070] [2024-06-14 14:11:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:28,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:28,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900899070] [2024-06-14 14:11:28,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900899070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:28,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:28,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:28,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380480021] [2024-06-14 14:11:28,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:28,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:28,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:28,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:28,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:28,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 133 transitions, 1170 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:28,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:28,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:28,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:29,262 INFO L124 PetriNetUnfolderBase]: 1425/2469 cut-off events. [2024-06-14 14:11:29,262 INFO L125 PetriNetUnfolderBase]: For 170554/170554 co-relation queries the response was YES. [2024-06-14 14:11:29,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13635 conditions, 2469 events. 1425/2469 cut-off events. For 170554/170554 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 14970 event pairs, 573 based on Foata normal form. 24/2492 useless extension candidates. Maximal degree in co-relation 13551. Up to 1837 conditions per place. [2024-06-14 14:11:29,283 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 45 changer transitions 10/166 dead transitions. [2024-06-14 14:11:29,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 166 transitions, 1712 flow [2024-06-14 14:11:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:11:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:11:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-14 14:11:29,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980769230769231 [2024-06-14 14:11:29,284 INFO L175 Difference]: Start difference. First operand has 189 places, 133 transitions, 1170 flow. Second operand 13 states and 259 transitions. [2024-06-14 14:11:29,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 166 transitions, 1712 flow [2024-06-14 14:11:29,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 166 transitions, 1606 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-14 14:11:29,490 INFO L231 Difference]: Finished difference. Result has 184 places, 130 transitions, 1136 flow [2024-06-14 14:11:29,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1136, PETRI_PLACES=184, PETRI_TRANSITIONS=130} [2024-06-14 14:11:29,490 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-14 14:11:29,490 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 130 transitions, 1136 flow [2024-06-14 14:11:29,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:29,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:29,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:29,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:11:29,491 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:29,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1072657175, now seen corresponding path program 16 times [2024-06-14 14:11:29,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:29,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047370239] [2024-06-14 14:11:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:29,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:29,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:29,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:29,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047370239] [2024-06-14 14:11:29,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047370239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:29,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:29,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:29,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82960798] [2024-06-14 14:11:29,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:29,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:29,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:29,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:29,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-14 14:11:29,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 130 transitions, 1136 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:29,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:29,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-14 14:11:29,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:30,158 INFO L124 PetriNetUnfolderBase]: 1274/2212 cut-off events. [2024-06-14 14:11:30,158 INFO L125 PetriNetUnfolderBase]: For 127005/127005 co-relation queries the response was YES. [2024-06-14 14:11:30,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11297 conditions, 2212 events. 1274/2212 cut-off events. For 127005/127005 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13103 event pairs, 528 based on Foata normal form. 26/2237 useless extension candidates. Maximal degree in co-relation 11215. Up to 1837 conditions per place. [2024-06-14 14:11:30,176 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 95 selfloop transitions, 40 changer transitions 14/155 dead transitions. [2024-06-14 14:11:30,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 155 transitions, 1512 flow [2024-06-14 14:11:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-06-14 14:11:30,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-14 14:11:30,177 INFO L175 Difference]: Start difference. First operand has 184 places, 130 transitions, 1136 flow. Second operand 12 states and 235 transitions. [2024-06-14 14:11:30,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 155 transitions, 1512 flow [2024-06-14 14:11:30,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 155 transitions, 1421 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:30,390 INFO L231 Difference]: Finished difference. Result has 182 places, 125 transitions, 1091 flow [2024-06-14 14:11:30,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1091, PETRI_PLACES=182, PETRI_TRANSITIONS=125} [2024-06-14 14:11:30,391 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-14 14:11:30,391 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 125 transitions, 1091 flow [2024-06-14 14:11:30,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:30,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:30,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:30,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:11:30,391 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:30,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:30,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1078073495, now seen corresponding path program 17 times [2024-06-14 14:11:30,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:30,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041569667] [2024-06-14 14:11:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:30,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat